{ "model": { "rank": 6445, "code": "thing-q26473", "model_id": "vr.tr.gregorian-chant", "name": "Gregorian chant", "purpose": "Enable an AI agent to recognise Gregorian chant, assess the evidence and usability of a particular version, and choose justified identification, transcription, comparison or performance actions.", "family": "Thing Registry", "category": "Information and virtual systems", "status": "research-draft", "kind": "thing", "plane": "INF", "domain": "INF.MED", "industry": "", "version": "", "url": "/models/thing/q26473/", "tier": 2, "score": 60, "payload": { "layer": "wikidata", "aliases": [ "Sarum chant", "Concentus", "accentus" ], "aliasCount": 3, "merged": 3, "knownIn": 60, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": null, "source": { "dataset": "wikidata", "item": "Q26473", "url": "https://www.wikidata.org/wiki/Q26473", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-07T14:38:49Z", "providers": [ "Codex", "Grok" ], "missingProviders": [], "pass": 2, "cost": { "grok": { "usd": 0.01057468, "turns": 1, "seconds": 186.5, "error": null }, "codex": { "seconds": 99.2, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.3\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a07c49-920e-73e3-b379-4caac6c765e9\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: Gregorian chant\nRegistry id: vr.tr.gregorian-chant\nPlane / domain: INF / INF.MED\nRegistry definition: (none recorded)\nNames folded into this entry: (" } } }, "metaModel": { "id": "THING-Q26473", "registryId": "vr.tr.gregorian-chant", "name": "Gregorian chant", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "INF.MED" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q26473/", "model": { "registry_id": "vr.tr.gregorian-chant", "name": "Gregorian chant", "purpose": "Enable an AI agent to recognise Gregorian chant, assess the evidence and usability of a particular version, and choose justified identification, transcription, comparison or performance actions.", "definition": "Gregorian chant is the Frankish-Roman repertory of monophonic, unaccompanied liturgical song that became the standard chant of the Roman Rite after the Carolingian recension of the eighth and ninth centuries: Latin (with a few Greek items) melodies transmitted first in staffless neumes and later on the four-line staff, and still the chant proper to the Latin liturgy of the Catholic Church.", "scope_statement": "This model owns Gregorian chant as a transmitted liturgical text-and-melody repertoire, including the relationships among chant items, local versions, notated witnesses and performance interpretations; it records the evidence needed to distinguish these without treating one edition or rendition as the entire tradition.", "in_scope": [ "Evidence for identifying a chant as Gregorian and distinguishing repertoire membership from stylistic resemblance", "Chant texts, melodic identities, constituent verses and relationships among variants", "Mass and Office functions within a specified liturgical use, calendar and historical setting", "Modal organisation, melodic formulas, text underlay and notation-dependent recoverability", "Transmission through manuscripts, editions and documented singing practices", "Readiness for transcription, comparison, rehearsal and contextually appropriate use" ], "out_of_scope": [ "Physical conservation, ownership and digitisation management of manuscript books", "Complete models of Catholic liturgy, doctrine or ecclesiastical governance", "Independent treatment of Ambrosian, Old Roman, Byzantine and other chant traditions", "Polyphonic compositions, organ accompaniments and commercial arrangements as independent musical works", "Audio engineering, recording distribution and media licensing", "General singer health, choir administration and concert logistics" ], "distinguishing_features": [ "Require evidence of Gregorian transmission or an explicitly documented relationship to that repertoire; a sacred text, Latin language or chant-like sound alone does not establish membership.", "Identify the underlying single melodic line and distinguish it from added harmony, drones or instrumental accompaniment in a particular arrangement.", "Check text, melody and liturgical placement together when distinguishing Gregorian witnesses from neighbouring Western plainchant traditions.", "Distinguish chant identity from notation: square notes may represent Gregorian chant, but their presence alone is insufficient and their absence does not exclude it.", "Distinguish a transmitted chant from a modern imitation by tracing its witnesses or declared adaptation history rather than judging atmosphere or recording style." ], "characteristics": [ { "name": "Repertoire attribution", "kind": "state", "unit_or_values": "supported Gregorian attribution; probable; disputed; related adaptation; unestablished", "why_it_matters": "Controls whether the agent may identify the item as Gregorian or must qualify that identification." }, { "name": "Identity relationships", "kind": "relation", "unit_or_values": "Links to text identity, melody identity, witness, edition and rendition, with the basis of each match", "why_it_matters": "Prevents a shared opening text or catalogue identifier from being mistaken for proof of melodic identity." }, { "name": "Liturgical genre", "kind": "category", "unit_or_values": "For example: introit, gradual, alleluia, tract, offertory, communion, antiphon, responsory, hymn or Ordinary setting; unresolved permitted", "why_it_matters": "Guides expectations about musical form and service function; terminology should be mapped to an identified vocabulary such as [Cantus genres](https://cantusdatabase.org/genres/)." }, { "name": "Liturgical assignment", "kind": "relation", "unit_or_values": "Service, position, occasion, local use and applicable historical period", "why_it_matters": "Makes selection dependent on a documented context rather than assuming universal placement." }, { "name": "Modal assessment", "kind": "category", "unit_or_values": "Mode 1-8 where applicable; exceptional; ambiguous; unknown; source attribution and analytical attribution retained separately", "why_it_matters": "Supports melodic comparison without forcing ambiguous examples into a single modal label." }, { "name": "Melodic compass", "kind": "measurement", "unit_or_values": "Lowest and highest recoverable pitches in a declared representation; unknown where pitch evidence is insufficient", "why_it_matters": "Supports comparison and singer suitability while separating written pitch from performance transposition." }, { "name": "Text-setting profile", "kind": "measurement", "unit_or_values": "Notes per syllable and locations of extended melismas, where notation supports counting", "why_it_matters": "Identifies demanding passages and differences in text underlay without imposing a universal syllabic-versus-melismatic threshold." }, { "name": "Notational recoverability", "kind": "state", "unit_or_values": "Text, pitch, grouping and rhythmic information each assessed as explicit, partial, inferred or unavailable", "why_it_matters": "Determines what an agent can transcribe directly and what requires comparison or an editorial decision." }, { "name": "Version completeness", "kind": "state", "unit_or_values": "Complete for stated use; incipit only; fragmentary; text-only; supplemented; uncertain", "why_it_matters": "Prevents an abbreviated witness from being presented as a complete singable version." }, { "name": "Performance interpretation", "kind": "relation", "unit_or_values": "Named edition, rhythmic approach, pronunciation practice and documented local convention", "why_it_matters": "Makes a rendition reproducible without presenting its interpretive choices as the only possible reading." } ], "affordances": [ "Identify candidate concordances using text, melody and liturgical context, retaining uncertainty where they disagree.", "Compare witnesses and editions while distinguishing textual, melodic, notational and functional differences.", "Transcribe recoverable chant information and explicitly mark supplied passages or interpretive additions.", "Select a version for a specified service or educational purpose after checking its assignment and completeness.", "Prepare rehearsal guidance covering text underlay, melodic range, repetitions and declared performance conventions.", "Refer unresolved repertoire attribution, notation or liturgical compatibility questions for specialist review." ] }, "sources": [ { "id": "hiley-1993", "title": "Western Plainchant: A Handbook - David Hiley, Clarendon Press / Oxford University Press, 1993", "url": "", "what_it_supports": "Repertory structure (Mass/Office genres), notation history, modal system, regional Latin chant dialects, and the distinction between Old Roman and Gregorian recensions." }, { "id": "apel-1958", "title": "Gregorian Chant - Willi Apel, Indiana University Press, 1958", "url": "", "what_it_supports": "Classic systematic account of genres, eight-mode classification, neumatic notation, and the syllabic/neumatic/melismatic stylistic range." }, { "id": "graduale-romanum-1974", "title": "Graduale Romanum, editio typica - Abbaye Saint-Pierre de Solesmes / Libreria Editrice Vaticana, 1974", "url": "", "what_it_supports": "The official post-conciliar Mass chant book: Ordinary and Proper assignments, modal labels, and the Vatican/Solesmes notational text used in current Roman Rite practice." }, { "id": "sacrosanctum-concilium-1963", "title": "Sacrosanctum Concilium (Constitution on the Sacred Liturgy) - Second Vatican Council, 4 December 1963", "url": "https://www.vatican.va/archive/hist_councils/ii_vatican_council/documents/vat-ii_const_19631204_sacrosanctum-concilium_en.html", "what_it_supports": "Art. 116: Gregorian chant has pride of place in liturgical services of the Roman Rite; other sacred music is admitted provided it accords with the liturgy.", "url_status": "live" }, { "id": "tra-le-sollecitudini-1903", "title": "Tra le sollecitudini - motu proprio of Pope Pius X, 22 November 1903", "url": "", "what_it_supports": "Modern legal-liturgical restoration: Gregorian chant as the supreme model of sacred music, to be restored to the people and the liturgy." }, { "id": "grove-gregorian", "title": "\"Gregorian chant\" - The New Grove Dictionary of Music and Musicians, Macmillan / Oxford University Press", "url": "", "what_it_supports": "Reference overview of origins (Roman-Frankish synthesis), manuscript families, Solesmes restoration, and neighbouring Latin chant dialects." } ], "structure": { "bundles": [ { "id": "gregorian-identity-and-boundaries", "name": "Gregorian identity and boundaries", "description": "Establish what is being identified and why its Gregorian attribution is defensible.", "rationale": "Sound, language and notation can suggest Gregorian chant without establishing repertoire membership.", "layers": [ { "id": "repertoire-membership", "name": "Repertoire membership", "description": "Assess attribution through transmission and explicit classification.", "findings": [ { "id": "basis-of-gregorian-attribution", "name": "Basis of Gregorian attribution", "description": "Record the witness or scholarly basis for attribution and any competing tradition assignment.", "questions": [ { "text": "Which inspected witness, edition or specialist account identifies this item or version as Gregorian?", "kind": "provenance", "id": "basis-of-gregorian-attribution-q01" }, { "text": "What evidence distinguishes it from Old Roman or Ambrosian chant, or from a modern Gregorian-style composition?", "kind": "boundary", "id": "basis-of-gregorian-attribution-q02" } ] } ] }, { "id": "chant-and-version-identity", "name": "Chant and version identity", "description": "Separate the chant being recognised from its particular representations.", "findings": [ { "id": "identity-resolution", "name": "Identity resolution", "description": "Establish whether a match concerns a text, melody, local version or particular witness.", "questions": [ { "text": "Is the object under assessment a chant item, a local version, an edition reading or a recorded rendition?", "kind": "definition", "id": "identity-resolution-q01" }, { "text": "Do matching names or incipits also match the remaining text, melody and function, and what does each identifier actually identify?", "kind": "boundary", "id": "identity-resolution-q02" } ] } ] } ] }, { "id": "liturgical-text-and-placement", "name": "Liturgical text and placement", "description": "Locate the chant within the words and ritual relationships that make its use intelligible.", "rationale": "A recognisable melody can still be incomplete or unsuitable for a proposed liturgical position.", "layers": [ { "id": "sung-text", "name": "Sung text", "description": "Establish the words actually transmitted and their organisation for singing.", "findings": [ { "id": "text-and-underlay", "name": "Text and underlay", "description": "Record the sung wording, syllable alignment and departures from a referenced textual source.", "questions": [ { "text": "What words and language are actually sung, including repetitions, omissions and text variants?", "kind": "definition", "id": "text-and-underlay-q01" }, { "text": "Which witness supports the syllable-to-melody alignment, especially around melismas and abbreviated text?", "kind": "provenance", "id": "text-and-underlay-q02" } ] } ] }, { "id": "ritual-assignment", "name": "Ritual assignment", "description": "Record genre, occasion and service relationships within a specified use.", "findings": [ { "id": "contextual-placement", "name": "Contextual placement", "description": "Keep service, genre, occasion and position distinct, following the distinctions documented in [Cantus field descriptions](https://cantusdatabase.org/description/).", "questions": [ { "text": "For which service, occasion and position is this version assigned, in which local use and period?", "kind": "provenance", "id": "contextual-placement-q01" }, { "text": "Which verses, responses, repetitions or associated psalmody are required to make the proposed use complete?", "kind": "action", "id": "contextual-placement-q02" } ] } ] } ] }, { "id": "melody-mode-and-formulas", "name": "Melody, mode and formulas", "description": "Describe musical identity through recoverable pitch relationships, modal evidence and recurring formulas.", "rationale": "Text alone cannot establish melodic sameness or determine how a version can be sung.", "layers": [ { "id": "modal-and-pitch-evidence", "name": "Modal and pitch evidence", "description": "Assess mode and compass without treating a classification as a substitute for the melody.", "findings": [ { "id": "qualified-modal-reading", "name": "Qualified modal reading", "description": "Evaluate final, range and associated formulas; retain disagreement between source labels and analysis. These are documented considerations in [Cantus modal indexing](https://cantusdatabase.org/description/).", "questions": [ { "text": "What final and melodic compass are recoverable, and how are transposition or uncertain pitches represented?", "kind": "measurement", "id": "qualified-modal-reading-q01" }, { "text": "Does the source assign a mode, does analysis support it, and what evidence remains ambiguous?", "kind": "boundary", "id": "qualified-modal-reading-q02" } ] } ] }, { "id": "formula-and-phrase-organisation", "name": "Formula and phrase organisation", "description": "Identify recurring melodic material and the relationships needed to connect chant sections.", "findings": [ { "id": "formula-and-psalmody-fit", "name": "Formula and psalmody fit", "description": "Record recitation, cadences, melismas and any specified connection between an antiphon and its psalm tone.", "questions": [ { "text": "Which passages use recurring melodic formulas, and which text-bearing phrases or melismas distinguish this version?", "kind": "definition", "id": "formula-and-psalmody-fit-q01" }, { "text": "Where psalmody is associated, which tone and termination are evidenced, and how should the return to the antiphon be realised?", "kind": "action", "id": "formula-and-psalmody-fit-q02" } ] } ] } ] }, { "id": "witnesses-notation-and-editorial-state", "name": "Witnesses, notation and editorial state", "description": "Track what sources preserve and what later readers have supplied.", "rationale": "An agent must distinguish readable evidence from reconstructed pitch, expanded abbreviations and editorial interpretation.", "layers": [ { "id": "witness-comparison", "name": "Witness comparison", "description": "Locate each reading and assess relationships among manuscript and edition versions.", "findings": [ { "id": "traceable-variant-evidence", "name": "Traceable variant evidence", "description": "Attach variant claims to inspectable passages and distinguish independent witnesses from derivative editions.", "questions": [ { "text": "Which manuscript location or edition passage supports each reading, and what is known about its date and local use?", "kind": "provenance", "id": "traceable-variant-evidence-q01" }, { "text": "Are differences textual, melodic, notational or editorial, and does the evidence justify treating them as versions of the same chant?", "kind": "boundary", "id": "traceable-variant-evidence-q02" } ] } ] }, { "id": "notation-and-reconstruction", "name": "Notation and reconstruction", "description": "Assess recoverability at passage level rather than assuming every notation encodes equivalent information.", "findings": [ { "id": "transcription-limits", "name": "Transcription limits", "description": "Distinguish directly legible signs from inferred pitch, rhythmic interpretation and supplied material.", "questions": [ { "text": "What does this notation directly establish about pitch, melodic grouping and delivery, and where are signs absent or illegible?", "kind": "measurement", "id": "transcription-limits-q01" }, { "text": "Which transcription decisions need a concordant witness or an editorial convention, and how will those additions remain visibly qualified?", "kind": "action", "id": "transcription-limits-q02" } ] } ] } ] }, { "id": "interpretation-and-use-readiness", "name": "Interpretation and use readiness", "description": "Determine whether a specified version is ready for a particular singing or study task.", "rationale": "Identification does not resolve pronunciation, rhythm, missing sections or compatibility with a proposed service.", "layers": [ { "id": "declared-singing-conventions", "name": "Declared singing conventions", "description": "Make practical interpretive choices explicit and distinguish them from source readings.", "findings": [ { "id": "reproducible-rendition", "name": "Reproducible rendition", "description": "Specify the selected reading and conventions needed to rehearse it consistently.", "questions": [ { "text": "Which edition or witness governs the rendition, and what pronunciation, rhythmic interpretation and ornament treatment are intended?", "kind": "definition", "id": "reproducible-rendition-q01" }, { "text": "What starting pitch, singer allocation and phrase or repetition instructions are needed for this ensemble?", "kind": "action", "id": "reproducible-rendition-q02" } ] } ] }, { "id": "task-specific-readiness", "name": "Task-specific readiness", "description": "Evaluate usability against the actual proposed task and its unresolved dependencies.", "findings": [ { "id": "conditions-for-use", "name": "Conditions for use", "description": "State whether evidence and musical material suffice for identification, study, rehearsal or the specified liturgical use.", "questions": [ { "text": "Which missing notes, words, verses or unresolved readings prevent this version from serving the requested task?", "kind": "boundary", "id": "conditions-for-use-q01" }, { "text": "Can the agent proceed with stated qualifications, or must it obtain another witness or a decision from the responsible musical or liturgical authority?", "kind": "action", "id": "conditions-for-use-q02" } ] } ] } ] }, { "id": "evidence-and-external-alignment", "name": "Evidence and external alignment", "description": "What the world already says about this thing, gathered so the model can be checked against it.", "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.", "layers": [ { "id": "reported-evidence", "name": "Reported evidence", "description": "Findings from the breadth pass, kept separate from the structural claims.", "findings": [ { "id": "evidence-kinds", "name": "Kinds and varieties", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "Mass Ordinary (Kyriale cycles: Kyrie, Gloria, Credo, Sanctus/Benedictus, Agnus Dei, Ite missa est)", "Mass Proper (introit, gradual, alleluia, tract, sequence, offertory, communion)", "Office antiphons with psalm tones (including invitatory and Magnificat/Benedictus antiphons)", "Great responsories of Matins (and shorter Office responsories)", "Office hymns", "Sequences (the medieval genre; a handful remain in the typical Gradual)", "Recitational liturgical tones (collect, lesson/epistle, gospel, preface, versicles)", "Tropes and other medieval interpolations (historically sung with chant, largely excluded after Trent)" ], "questions": [ { "id": "evidence-kinds-q01", "text": "Which of these kinds and varieties hold for the sense of Gregorian chant this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-identifiers", "name": "Identifiers and schemes", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ { "scheme": "Wikidata", "value_or_pattern": "Q104643", "note": "Item for Gregorian chant as a repertory/genre." }, { "scheme": "Library of Congress Subject Headings", "value_or_pattern": "Gregorian chants", "note": "Standard LCSH used in library cataloguing of the repertory and of individual chant books." }, { "scheme": "Dewey Decimal Classification", "value_or_pattern": "782.3222", "note": "Sacred vocal music: Gregorian chant." }, { "scheme": "Cantus Index / Cantus Database chant ID", "value_or_pattern": "numeric or alphanumeric chant IDs (e.g. six-digit Cantus IDs; genre-prefixed Index IDs)", "note": "Indexes individual Office (and some Mass) chants across medieval manuscripts; University of Waterloo Cantus Database and Cantus Index." }, { "scheme": "Corpus Antiphonalium Officii (CAO / Hesbert)", "value_or_pattern": "CAO numbers assigned to antiphons and responsories", "note": "Standard scholarly numbering for the early medieval Office repertory." } ], "questions": [ { "id": "evidence-identifiers-q01", "text": "Which of these identifiers and schemes hold for the sense of Gregorian chant this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-standards-and-regulation", "name": "Standards and regulation", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "Tra le sollecitudini (22 November 1903), motu proprio of Pope Pius X: Gregorian chant as the supreme model of sacred music for the Roman Church.", "Sacrosanctum Concilium (4 December 1963), Second Vatican Council, art. 116: Gregorian chant is to be given pride of place in Roman Rite liturgical services.", "Musicam sacram (5 March 1967), instruction of the Sacred Congregation of Rites on music in the liturgy, implementing the Council on chant, participation, and other sacred music.", "Graduale Romanum, editio typica (Vatican/Solesmes, 1908; typical edition adapted to the new Missal, 1974): official Mass chant book of the Roman Rite.", "Ordo cantus Missae (Congregation for Divine Worship, 1972, with later typical updates): calendar assignment of Mass Propers after the 1969/70 Missal.", "Antiphonale Romanum / Liturgia Horarum chant books (Holy See / Solesmes): typical Office chant for the post-conciliar Hours, alongside older monastic antiphonals still used in houses that retain them." ], "questions": [ { "id": "evidence-standards-and-regulation-q01", "text": "Which of these standards and regulation hold for the sense of Gregorian chant this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-real-world-use", "name": "Real-world use", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "Sung as the liturgical music of Roman Catholic Mass and the Liturgy of the Hours, especially in Benedictine and other monastic houses (e.g. Solesmes and its filiations) and in communities using the 1962 Missal with the Liber Usualis or 1962 Gradual.", "Parish and cathedral scholae cantorum preparing Sunday Propers and Ordinary cycles from the Graduale Romanum, Graduale Triplex, or simplified Graduale simplex.", "University and conservatory study of medieval notation, modality, and performance practice (Solesmes classic method vs Cardine semiology vs mensuralist readings).", "Source cantus firmus for medieval organum, Renaissance Mass and motet composition, and later hymn tunes.", "Concert programming and commercial recording as 'early music', and as a cinematic/media signifier of liturgy, monastic life, or the Middle Ages." ], "questions": [ { "id": "evidence-real-world-use-q01", "text": "Which of these real-world use hold for the sense of Gregorian chant this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-measurements", "name": "Typical measurements", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ { "quantity": "church mode (octoechos of Western chant)", "typical_range": "1-8 (authentic/plagal pairs on finals D, E, F, G)", "unit": "mode number" }, { "quantity": "ambitus of a chant melody", "typical_range": "a fifth to an eleventh; many Propers sit near an octave", "unit": "diatonic degrees" }, { "quantity": "notes per syllable (style)", "typical_range": "1 (syllabic recitation) through 2-4 (neumatic) to 10-30+ (melismatic jubilus, especially alleluias)", "unit": "notes/syllable" }, { "quantity": "duration of a Mass Proper item in liturgical performance", "typical_range": "about 0.5-4", "unit": "minutes" }, { "quantity": "absolute pitch", "typical_range": "not historically fixed; modern scholae usually place the final so the melody lies in a comfortable mid-voice band (often around D3-G4 for mixed or male choirs)", "unit": "scientific pitch / Hz (performance choice, not a property of the notation)" } ], "questions": [ { "id": "evidence-measurements-q01", "text": "Which of these typical measurements hold for the sense of Gregorian chant this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-failure-modes-and-hazards", "name": "Failure modes and hazards", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "Wrong Proper for the calendar day (pre- vs post-conciliar assignments differ; local feasts and votive Masses are a frequent source of error).", "Modal collapse from equal-tempered organ accompaniment, chromatic 'harmonization', or a finalis pitched so the half-step structure of the mode is distorted.", "Incompatible rhythmic readings of the same Vatican/Solesmes page (classic Solesmes ictus method, equalist chanting, mensuralism, Cardine semiology), so ensembles cannot agree on duration or grouping.", "Text underlay and Latin pronunciation faults that break the syllable-to-neume alignment the notation encodes.", "Loss of manuscript variants and medieval local uses when a single typical edition is treated as the only historical text.", "Vocal fatigue, intonation drift, and pitch sag in unaccompanied long Offices if the reciting pitch is set too high or too low.", "Liturgical and pedagogical confusion when later polyphony, falsobordone, or popular 'monastic atmosphere' recordings are taken as the Gregorian repertory itself." ], "questions": [ { "id": "evidence-failure-modes-and-hazards-q01", "text": "Which of these failure modes and hazards hold for the sense of Gregorian chant this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-regional-variation", "name": "Regional variation", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "Old Roman manuscripts (Rome, 11th-13th centuries) preserve a related but melodically distinct recension; 'Gregorian' in the usual sense is the Frankish-Roman synthesis that spread from the Carolingian north.", "Religious-order dialects: Dominican, Cistercian, Carthusian, and Premonstratensian books simplify or recast the Roman-Gregorian melodies rather than replace the rite.", "Medieval secular uses (Sarum in England, and other diocesan uses) assigned different Office chants and some Mass variants; most were suppressed or absorbed after Trent.", "Performance schools: Solesmes (France) vs German restoration/mensuralist traditions vs Cardine's Gregorian semiology reading of Laon and St Gall neumes in the Graduale Triplex.", "Liturgical Latin pronunciation (Italianate curial vs traditional French, German, or English church Latin) changes vowel colour and perceived accent, not the notated pitches.", "Calendar: 1962 Liber Usualis assignments versus 1974 Graduale Romanum / Ordo cantus Missae assignments for the same feast names." ], "questions": [ { "id": "evidence-regional-variation-q01", "text": "Which of these regional variation hold for the sense of Gregorian chant this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-neighbours", "name": "Neighbouring kinds and how to tell them apart", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ { "name": "Ambrosian (Milanese) chant", "difference": "Belongs to the Ambrosian Rite, not the Roman Rite: different Mass/Office structure, recitation formulas, and cadence types; still used in Milan. Shared Latin liturgy is not a test - rite and recitation formulas are." }, { "name": "Old Roman chant", "difference": "Often the same liturgical texts and genres, but a different melodic ductus (typically more ornamental, different cadential behaviour) attested in a small Roman manuscript family, not the Frankish Gradual/Antiphonal stemma." }, { "name": "Mozarabic (Old Hispanic) chant", "difference": "Hispanic rite repertory (Toledo and related sources), different notation and liturgical structure; surviving practice is a distinct restoration, not Roman-Gregorian." }, { "name": "Byzantine chant", "difference": "Greek (or Church Slavonic) liturgical song with ison (drone) and the Eastern oktōēchos; not monophonic unaccompanied Latin plainsong of the Roman Gradual." }, { "name": "Anglican chant", "difference": "Four-part harmonic recitation of English psalmody pointed to a short repeating formula; polyphonic and vernacular, not medieval monophonic Latin chant." }, { "name": "Falsobordone / fauxbourdon psalmody", "difference": "Harmonic (often four-voice) recitation of psalms or canticles; the presence of simultaneous consonant parts separates it from Gregorian monophony." }, { "name": "Gallican chant", "difference": "Pre-Carolingian Frankish liturgical song, mostly lost as a closed repertory; surviving traces are identified by non-Roman texts/formulas, not by later Vatican-edition melodies." }, { "name": "Later polyphonic Masses on Ordinary texts", "difference": "Kyrie/Gloria etc. as cantus-firmus or freely composed polyphony; test is texture and notation (multiple voice parts, mensural/modern score) versus a single unaccompanied chant line." } ], "questions": [ { "id": "evidence-neighbours-q01", "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of Gregorian chant this model covers, and on what evidence?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Which scholarly and practitioner definitions should govern the inclusion of later compositions, local repertories and vernacular adaptations under this registry entry?", "What evidence is sufficient to distinguish a melodic variant from a different chant when texts and liturgical assignments overlap?", "Which notational traditions require specialist rules before pitch, ornament or rhythmic implications can be represented reliably?", "How should competing rhythmic interpretations be compared without elevating one performance school into a universal historical claim?", "Which historical uses and contemporary liturgical authorities must be researched before the agent can judge suitability for a particular service?" ], "statistics": { "bundles": 6, "layers": 11, "findings": 18, "questions": 28 } }, "draft": { "generator": "vr.draft.v3", "status": "draft-generated", "researched": false, "archetype": "work, medium or creative form", "method": "Written from the archetype playbook - what this kind of thing needs beyond identity and provenance - and from the structure that recurred across 6,333 models already researched by two engines. Applied to this entry by rule. No source was read for this thing and no claim here is researched. This entry carries no facets of its own, so they were inferred from its domain - a guess about a whole domain applied to one thing.", "facetsInferred": true, "nextPass": "A researcher replaces this draft with a sourced specification. Treat every sentence below as a proposal to argue with.", "purpose": "Give an agent a durable, checkable way to recognise a Gregorian chant, record what state it is in, and decide what may be done with it.", "whatItIs": "Enable an AI agent to recognise Gregorian chant, assess the evidence and usability of a particular version, and choose justified identification, transcription, comparison or performance actions.", "characteristics": { "substance": "information", "origin": "conceptual", "agency": "inert" }, "whatYouCanDoWithIt": [ "read and interpreted", "observed and measured" ], "distinguishingFeatures": [ "Names folded into this entry, which a task may need to split apart again: Sarum chant, Concentus, accentus.", "3 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.", "Described in 60 Wikipedia languages, which is a measure of how widely the thing is known, not of how important it is." ], "openQuestionsForResearch": [ "Which of the bundles below does a real task actually need, and which are ceremony?", "What does this thing have that the facets do not capture at all?", "Which neighbouring kind is most often confused with a Gregorian chant, and on what evidence are they told apart?" ], "whatItIsMadeOf": "content that has to be carried by something else", "physicalCharacter": [ "Does nothing on its own; everything it does, something else did to it.", "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing." ], "whatCanBeDoneWithIt": [ "read it and act on what it says", "observe it, measure it, record its state" ], "howItIsRecognised": [ "What is seen is a copy or a performance, not the work. Recognising the work means recognising the content through whatever is carrying it." ], "relatedModels": [ { "relation": "covers", "note": "Finer kinds folded into this entry because telling them apart needs a task that asks for it. Each is a model waiting to be split out when one does.", "targets": [ "Sarum chant", "Concentus", "accentus" ] } ], "standing": "Described in 60 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 3 finer distinctions are held inside this entry as names rather than as separate models.", "structure": { "bundles": [ { "id": "identity-and-classification", "name": "Identity, naming and classification", "description": "How an agent tells one Gregorian chant from another, and a Gregorian chant from things that resemble it.", "rationale": "Recognition comes before every other claim. Without stable identity nothing else in the model can be trusted to be about the same thing twice.", "layers": [ { "id": "naming-and-identifiers", "name": "Names and identifiers", "description": "The names this thing goes by and the identifiers that survive translation and time.", "findings": [ { "id": "preferred-name-and-aliases", "name": "Preferred name, aliases and local names", "description": "Which name to use, which names mean the same thing, and which merely sound similar.", "questions": [ { "id": "preferred-name-and-aliases-q01", "text": "What identifies and describes the name of a Gregorian chant, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "preferred-name-and-aliases-q02", "text": "Who or what asserted this about the name of a Gregorian chant, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "preferred-name-and-aliases-q03", "text": "What may an agent decide or do once the name of a Gregorian chant is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "stable-identifiers", "name": "Stable identifiers and external keys", "description": "Identifiers that keep pointing at this kind of thing across systems and languages.", "questions": [ { "id": "stable-identifiers-q01", "text": "What identifies and describes an identifier for a Gregorian chant, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stable-identifiers-q02", "text": "Who or what asserted this about an identifier for a Gregorian chant, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stable-identifiers-q03", "text": "What may an agent decide or do once an identifier for a Gregorian chant is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "classification-and-granularity", "name": "Classification and granularity", "description": "Where a Gregorian chant sits among kinds, and how finely a task needs to cut it.", "findings": [ { "id": "kind-and-parents", "name": "Kind, parents and neighbouring kinds", "description": "The classes this thing belongs to and the ones it is next to.", "questions": [ { "id": "kind-and-parents-q01", "text": "What identifies and describes the kind of a Gregorian chant, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "kind-and-parents-q02", "text": "Who or what asserted this about the kind of a Gregorian chant, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "kind-and-parents-q03", "text": "What may an agent decide or do once the kind of a Gregorian chant is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "distinguishing-features", "name": "Distinguishing features", "description": "What separates a Gregorian chant from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a Gregorian chant, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "distinguishing-features-q02", "text": "Who or what asserted this about what distinguishes a Gregorian chant, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "distinguishing-features-q03", "text": "What may an agent decide or do once what distinguishes a Gregorian chant is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "state-and-lifecycle", "name": "State and lifecycle", "description": "The states a Gregorian chant passes through and the events that move it between them.", "rationale": "Most decisions about a thing depend on what state it is in now, which is a claim with a time on it, not a property.", "layers": [ { "id": "lifecycle-stages", "name": "Lifecycle stages", "description": "From coming into existence to ceasing to be one of these.", "findings": [ { "id": "stages-and-transitions", "name": "Stages and transitions", "description": "The stages worth naming and what moves a Gregorian chant between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a Gregorian chant, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stages-and-transitions-q02", "text": "Who or what asserted this about the lifecycle of a Gregorian chant, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stages-and-transitions-q03", "text": "What may an agent decide or do once the lifecycle of a Gregorian chant is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "observations-and-status", "name": "Observations and current status", "description": "What is observed about a Gregorian chant, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a Gregorian chant is recorded so that it can be superseded rather than overwritten.", "questions": [ { "id": "observation-record-q01", "text": "What identifies and describes an observation of a Gregorian chant, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "observation-record-q02", "text": "Who or what asserted this about an observation of a Gregorian chant, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "observation-record-q03", "text": "What may an agent decide or do once an observation of a Gregorian chant is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "content-and-access", "name": "Content, encoding and access", "description": "What a Gregorian chant says, how it is encoded and who may read it.", "rationale": "An informational thing carries content that can be copied, versioned and withheld, none of which its physical carrier explains.", "layers": [ { "id": "content-and-encoding", "name": "Content and encoding", "description": "The content itself, its format and its language.", "findings": [ { "id": "content-and-format", "name": "Content, format and language", "description": "What a Gregorian chant contains and in what form it is held.", "questions": [ { "id": "content-and-format-q01", "text": "What identifies and describes the content of a Gregorian chant, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "content-and-format-q02", "text": "Who or what asserted this about the content of a Gregorian chant, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "content-and-format-q03", "text": "What may an agent decide or do once the content of a Gregorian chant is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "access-and-rights", "name": "Access, rights and retention", "description": "Who may read, copy or change it, and for how long it is kept.", "findings": [ { "id": "access-rules", "name": "Access rules and retention", "description": "The permissions attached to a Gregorian chant and the period it survives.", "questions": [ { "id": "access-rules-q01", "text": "What identifies and describes access to a Gregorian chant, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "access-rules-q02", "text": "Who or what asserted this about access to a Gregorian chant, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "access-rules-q03", "text": "What may an agent decide or do once access to a Gregorian chant is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "work-and-manifestation", "name": "Work, version and copy", "description": "Which level of Gregorian chant a statement is about.", "rationale": "The work, the edition, the file and the copy in hand are four things; rights and content attach to different ones.", "layers": [ { "id": "levels", "name": "Levels of the thing", "description": "Work, expression, manifestation and item, in plain terms.", "findings": [ { "id": "level-rules", "name": "What belongs at each level", "description": "Which facts hold for the work and which only for one copy.", "questions": [ { "id": "level-rules-q01", "text": "For Gregorian chant, which facts belong to the work itself, which to a version, and which to a single copy?", "kind": "boundary" }, { "id": "level-rules-q02", "text": "What identifier exists at each level, and which one is being cited?", "kind": "definition" } ] } ] }, { "id": "versions", "name": "Versions, editions and variants", "description": "How versions differ and which is canonical to whom.", "findings": [ { "id": "version-record", "name": "Versions and canonicity", "description": "Differences that matter and who calls one authoritative.", "questions": [ { "id": "version-record-q01", "text": "Which versions or editions of Gregorian chant exist, and how do they differ substantively?", "kind": "definition" }, { "id": "version-record-q02", "text": "Who treats which version as authoritative, and for what purpose?", "kind": "provenance" } ] } ] } ] }, { "id": "authorship-and-rights", "name": "Authorship, rights and permitted use", "description": "Who made Gregorian chant and what may be done with it.", "rationale": "Rights are jurisdictional, time-limited and attached to a level, and an agent that ignores that will copy what it may not.", "layers": [ { "id": "authorship", "name": "Authorship and contribution", "description": "Who contributed what, and in what capacity.", "findings": [ { "id": "contribution-record", "name": "Contributors and roles", "description": "The people and bodies behind it, with their roles.", "questions": [ { "id": "contribution-record-q01", "text": "Who authored or contributed to Gregorian chant, in what roles, and how is that attested?", "kind": "provenance" }, { "id": "contribution-record-q02", "text": "Where authorship is disputed or anonymous, what is recorded instead?", "kind": "boundary" } ] } ] }, { "id": "rights", "name": "Rights and permissions", "description": "Which rights subsist, where, until when, and what they permit.", "findings": [ { "id": "rights-record", "name": "Rights, term and permitted acts", "description": "The regime in force and what it allows.", "questions": [ { "id": "rights-record-q01", "text": "What rights subsist in Gregorian chant, in which jurisdictions, and until when?", "kind": "definition" }, { "id": "rights-record-q02", "text": "Which acts are permitted without further permission, and which must an agent refuse?", "kind": "action" } ] } ] } ] }, { "id": "provenance-and-evidence", "name": "Provenance, evidence and time", "description": "Where every claim about a Gregorian chant came from and when it held.", "rationale": "A claim without a source and a time cannot be superseded, only overwritten, and an agent that overwrites loses the ability to explain itself.", "layers": [ { "id": "source-and-authority", "name": "Source and authority", "description": "Who said it, on what evidence, and how strongly.", "findings": [ { "id": "claim-provenance", "name": "Claim provenance and confidence", "description": "The authority behind each claim about a Gregorian chant and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a Gregorian chant, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "claim-provenance-q02", "text": "Who or what asserted this about a claim about a Gregorian chant, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "claim-provenance-q03", "text": "What may an agent decide or do once a claim about a Gregorian chant is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "time-and-versions", "name": "Time, versions and supersession", "description": "When a claim was true, when it was learnt, and what replaced it.", "findings": [ { "id": "validity-and-supersession", "name": "Validity period and supersession", "description": "How an old claim about a Gregorian chant is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a Gregorian chant, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "validity-and-supersession-q02", "text": "Who or what asserted this about the validity of a claim about a Gregorian chant, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "validity-and-supersession-q03", "text": "What may an agent decide or do once the validity of a claim about a Gregorian chant is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] } ] }, "statistics": { "bundles": 6, "layers": 12, "findings": 14, "questions": 38 } } } }