tap
Let an agent describe and identify basketball shot-blocking actions, distinguish attempted blocks from successful blocks, and explain their relationship to fouls and goaltending under the applicable rules.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
The act and its target What is tapped, by what, and how.
Actor and instrument
Who or what taps, and with what.
Actor and instrument
The agent performing it and the thing used.
- Who or what performs this tap, and with what instrument? definition
- What changes about the act when the instrument changes? boundary
Target and surface
What is tapped and how it responds.
Target and response
The surface struck and what it does in reply.
- What is being tapped, and what response does the surface give? definition
- What surfaces would not register it, and why? boundary
Pattern and meaning What the tapping is meant to convey.
Pattern and timing
Count, interval and rhythm.
Pattern definition
The pattern performed and the tolerances around it.
- What pattern of taps is performed, with what intervals? measurement
- What tolerance is allowed before the pattern is a different one? boundary
Agreed meaning
The convention that gives it sense.
Convention in force
The code or convention that interprets it.
- Under what convention does this pattern carry meaning, and agreed by whom? provenance
- What should a receiver do with a pattern that matches no convention? action
Detection and interpretation How a system decides a tap happened.
Detection thresholds
Duration, force and area thresholds.
Thresholds applied
The values that decide whether contact counts.
- What thresholds decide that a tap occurred in this system? measurement
- Who is excluded by those thresholds, and how is that mitigated? action
Disambiguation
Telling it from press, hold and accidental contact.
Disambiguation rules
How competing interpretations are resolved.
- How does the system distinguish a tap from a press, a hold or incidental contact? definition
- What happens when the classification is wrong, and how is that recoverable? action
Use and consequence What follows from it.
Effect
What the tap causes.
Caused effect
The action triggered and its reversibility.
- What does this tap cause, and is that reversible? action
- Which effects should require more than a tap, and why? boundary
Record of the event
What is logged and what it proves.
Event record
What is recorded about the tap and its evidential value.
- What is recorded when this tap happens, with what timestamp and context? provenance
- What may not be inferred from that record about who performed it? boundary
Classifiers Filled
- Family
- Thing Registry
- Category
- Activities and processes
- Entry kind
- thing
- Plane
- ACT
- Domain
- ACT.ACT
What it is Filled
A defensive action in basketball in which a player places a hand in the path of an opponent's shot toward the basket to obstruct or block the ball.
Why it exists Filled
Let an agent describe and identify basketball shot-blocking actions, distinguish attempted blocks from successful blocks, and explain their relationship to fouls and goaltending under the applicable rules.
Distinguishing features Filled
- The action occurs when a defender challenges an opponent's shot toward the basket.
- The defender's hand obstructs or attempts to obstruct the ball's path.
- An attempted block does not necessarily make contact with the ball.
- Legality depends on the applicable basketball rules and the circumstances of the play.
What robots and AI may and may not do Filled
Must not
- Encourage dangerous contact or deliberate injury during a block attempt.
- Present an uncertain judgement about a foul or goaltending as established fact.
- Treat every defensive hand movement near a shot as a successful block.
Only with a human decision
- Making binding officiating decisions without explicitly delegated authority.
- Assessing a player's injury or fitness to continue playing.
May
- Describe shot-blocking actions in basketball footage it is authorized to analyse.
- Explain the distinction between a block attempt, a successful block and a possible rules violation.
- Flag uncertainty when the available view does not establish what happened.
Moral aspects Filled
- Player safety takes priority over preventing a basket.
- Analysis should apply rules consistently and acknowledge uncertainty.
- Commentary should distinguish a disputed play from an unsupported judgement about a player's intent.
Who is affected
- Players can be affected by physical contact and officiating decisions.
- Coaches and teams rely on accurate descriptions of defensive play.
- Officials are responsible for applying the rules within their authority.
Owners Filled
Steward
Nobody owns the action; the relevant basketball governing body maintains the applicable rules.
Links to other meta-models Filled
parent
- Q61996437 - registry parent class
related
- physical action - inherits actor, target and outcome structure
- press - the difference is duration, which interfaces must decide by threshold
- input event - in a device the tap becomes an event with a timestamp and coordinates
- tap as a water fitting - a homonym in English; the fitting is a device and this is an act
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.tap-q1423035
- Wikidata: Q1423035 (https://www.wikidata.org/wiki/Q1423035)
Direct properties not applicable Not applicable
- contact duration: 20-200 ms - above roughly 500 ms most interfaces treat it as a hold
- interval for a double tap: 150-500 ms - the window is a design choice and an accessibility issue
- force: 0.1-5 N - above this it is a knock or a strike
Plane ACT: no invented physical properties.
Recognition optional Filled
- An opponent is shooting the ball toward the basket.
- A defender extends a hand into the shot's path.
- Contact with the ball may visibly alter its path.
- A single image may not establish contact, timing or the legality of the action.
- Not seen so much as heard and felt: a brief contact repeated, too short to be a push and too light to be a blow.
Capabilities and actions required Filled
- do it, with a finger, a tool or a machine
- detect it, which is how touchscreens and knock sensors work
- interpret it, where a pattern carries a meaning agreed in advance
- mistake incidental contact for it, which is the main failure
Hazards and failure modes required Filled
- Contact during a block attempt can cause a foul or player injury.
- An apparent block can constitute goaltending or basket interference under the applicable rules.
- An obstructed view can lead to an incorrect judgement about ball contact or a foul.
- Confusing this sense with light tapping misrepresents the basketball action.
Standards and interfaces required Filled
- Accessibility guidance on timing, which requires adjustable double-tap intervals
- Human interface guidelines from platform vendors, which define the gesture vocabulary
Context of use required Filled
- Producing a signal without force: getting attention, testing a surface, entering input, or marking time.
- by purpose: attention, input, testing, rhythm, signalling
- by agent: finger, tool, machine
- by pattern: single, double, long sequence such as a coded knock
Sources Filled
- Wikidata item Q1423035: tap - identity and sense of the item
- Wikipedia: Block (basketball) - general description of the item
Open questions
- Should the physical act and the interface event be separate models, given that one has force and the other has coordinates?
- How should intent be represented when it cannot be observed, only inferred?
- What thresholds should the model carry so that accessibility requirements are visible rather than buried in an implementation?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q1423035/spec.json