Phenomenon Namespace

Core Definition

Phenomenon frames profile dynamic occurrences where the event itself is the primary semantic content. Something happens — the happening is what matters most. Participants are optional, backgrounded, or semantically underspecified; no volitional Agent is required or profiled. This namespace serves as a residual category for dynamic events that don't fit the more specialized namespaces (Agentive, Change, Undergoing, Experiential).

Formal template:

OCCUR(Event) [± Theme] [± Location] [± Time]

Existence as a phenomenon

Existence is the limiting case of a bare occurrence: an entity's simply being there — holding, obtaining, occurring in the world — with no agent, no cause, and no resultant state. Existential and impersonal predications (existir — to exist, haver — there to be) profile this sheer occurrence directly:

• Existe vida em Marte (There is life on Mars)
• Há problemas (There are problems)
• Houve um terremoto (There was an earthquake)

Existence belongs here — not in Stative — when what is profiled is the occurrence of something in the world rather than a static property predicated of an entity. The existential haver / ocorrer construction is exactly the impersonal signature Phenomenon is built for (see Test 5). Distinguish existence from appearing / vanishing (surgir, aparecer, desaparecer): those profile an entity reaching a new resultant condition (coming into or going out of being) and are Change; bare existence profiles no such transition.

Scope

Includes:

• Natural/meteorological phenomena: chover (rain), nevar (snow), vento soprar (wind blow)
• Geological and physical occurrences: terremoto (earthquake), erosão (erosion), erupção (eruption)
• Atelic physical activities (generic Theme, no result state): fluir (flow), brilhar (shine), arder (blaze)
• Spontaneous occurrences: acontecer (happen), ocorrer (occur)
• Existence / existential predication: existir (exist), haver (there be) — the sheer occurrence of something in the world

Excludes — see other namespaces:

• Volitional agent activities → Agentive (João correu — João ran)
• Any caused result — including by a natural force → Agentive (João quebrou o vaso; O vento quebrou a janela)
• Result-state-focused change with no causer profiled → Change (O vaso quebrou — The vase broke)
• Spontaneous change of state — a Theme reaching a new resultant condition, even with no agent → Change. This includes biological, physical, and existential changes: ripening, rotting, growing, evaporating, rusting, appearing, and vanishing (amadurecer, apodrecer, crescer, evaporar, oxidar, surgir, aparecer, desaparecer, extinguir-se). Spontaneity alone does not make such an event a Phenomenon.
• An affected Patient undergoing an externally-instigated event (not a bare occurrence with a generic Theme) → Undergoing (A colheita sofreu com a geada)
• Path/goal-oriented motion → Change (motion subtype)
• Static properties → Attribute; static relations → Relational

Critical boundary — a caused result is never a Phenomenon: Phenomenon covers bare occurrences with no caused change. The moment a causer (of any kind) acts on a Patient to produce a result, the frame is Agentive, because a natural force is a non-intentional Cause — not a reason to choose Phenomenon:

• O vento soprou (the wind blew) → Phenomenon (no Patient, no result — a pure occurrence)
• O vento quebrou a janela (wind broke the window) → Agentive (o vento = Cause; janela = Patient; result profiled)
• A janela quebrou (the window broke) → Change (affected entity in subject, causer unprofiled)

Subtypes

Telicity: Most phenomenon frames can be classified by a single test:

• "por X tempo" (for X time) compatible → atelic Activity (O rio fluiu por horas)
• "em X tempo" (in X time) compatible → telic Accomplishment (A vela consumiu-se em duas horas)

The same frame can shift depending on context: A madeira queimou por horas (atelic — ongoing burning) vs. A madeira queimou em duas horas (telic — burned down completely).

Participant flexibility: A defining property across all subtypes:

• Absent: Choveu (It rained — zero participants)
• Optional: Houve um terremoto [no Chile] (Location not required)
• Underspecified: A água flui (Theme present but role is generic — not Agent, not Patient)

Characteristic signature

The residual namespace: a frame is classified here when it profiles a dynamic occurrence but fits no more specialised namespace. It covers occurrences with no caused change profiled and no resultant state of an entity — natural phenomena (choveu, o vento soprou) and atelic natural/physical occurrences (a água flui, a fogueira arde). Choose Phenomenon only when nothing better fits: an occurrence that profiles a resultant state of an entity is Change.

A natural force that produces a result is not a Phenomenon. Membership turns on the absence of a caused change, never on the nature of the causer. A natural/physical force acting on a Patient to bring about a Result is a non-Sentient Cause, so o vento quebrou a janela is Agentive, not here — exactly as João quebrou a janela is. The Sentient vs. non-Sentient contrast only splits Agent from Cause inside Agentive; it does not gate Agentive vs. Phenomenon. What lands in Phenomenon is the intransitive counterpart with no causer profiled (o vento soprou, a janela quebrou-as-occurrence).

graph LR
    Event(("Event"))
    Theme["Theme<br/><i>CONSTITUTIVE</i><br/>optional, generic"]

    Event -.->|optional| Theme

    classDef core fill:#8B0000,stroke:#8B0000,color:#fff
    classDef opt fill:#fff,stroke:#8B0000,stroke-dasharray:4 3,color:#8B0000
    class Event core
    class Theme opt

Multiple participants in Phenomenon. Phenomenon's signature is deliberately thin — Event plus an optional, generic Theme. Real phenomenon frames often have more than one participant, which raises two recurring questions; the answers follow from §1:

• Do not group two distinct participants under the same Theme. A qualia role is one role slot; treating two FEs as the same Theme asserts they play the same generic role and erases the distinction the qualia vocabulary exists to record. Reserve co-typing for genuinely co-typed participants (a reciprocal pair, X e Y colidiram).
• Record a sharper participant on a sharper CONSTITUTIVE sub-role, not as a second Theme. In §1, Instrument, Source, Path, Part, and Material are all is_a Theme — refinements of the generic participant. Assign the sub-role that fits; use bare Theme only when there is no sharper characterization.
• Coverage is partial by design. Genuinely peripheral participants need not be characterized at all; their being left out is itself informative.

A participant that is clearly affected and reaches a result state is a smell: that Patient + Result signature is the Agentive/Change signature, not Phenomenon's. Such a frame is a candidate for Change instead — or, if a causer is profiled in subject position, for Agentive outright. (Recall that, under the boundary above, a natural-force causer makes the frame Agentive, not a Phenomenon.) Note that OCCURRENCE and CHANGE can genuinely be indistinguishable at the binding level when a pure-result change frame has no separate FE for its resultant condition — that's not a construal choice either, and it's the namespace, not the profile, that tells the two apart; see the boundary note in the Schema Catalog's EVENT profiles section (docs/conceptual/schema_catalog.md).

Diagnostic Tests

These tests are meant to be applied to a frame's core participants and semantic structure to determine whether it belongs in the Phenomenon namespace.

Test 1 — No Agent required

Can the core event occur without specifying a volitional agent?

✓ Choveu (It rained — agent impossible) → PHENOMENON
✗ João matou (agent obligatory) → NOT PHENOMENON

Test 2 — Agent incompatibility

Is adding an intentional human agent as subject odd or ungrammatical?

✓ A rocha erodiu (The rock eroded — no agent) → PHENOMENON
✗ João construiu a casa (agent required) → NOT PHENOMENON (Agentive)

Test 3 — Spontaneity

Is the event conceptualized as arising naturally, without external instigation?

✓ O vento soprou (The wind blew — arises naturally, no instigator) → PHENOMENON
✗ João soprou a poeira (agent instigates) → CAUSATIVE (if acceptable)

Spontaneity separates non-caused from caused events, but it does not by itself select Phenomenon: a spontaneous occurrence that yields a resultant state (a fruta amadureceu, o vaso quebrou) is Change, not a Phenomenon.

Test 4 — Middle voice se

Does the frame naturally accept reflexive se to signal spontaneity?

✓ O problema se resolveu (The problem resolved itself) → PHENOMENON
✗ *João se construiu uma casa (ungrammatical middle) → NOT PHENOMENON

Test 5 — Impersonal or existential construction

Can the frame appear impersonally or with haver / ocorrer?

✓ Choveu muito / Houve uma tempestade / Existe vida em Marte → PHENOMENON
✗ *Houve João matando Pedro (unnatural) → NOT PHENOMENON

Test 6 — Participant minimality

Can the frame occur with no or minimal specified participants?

✓ Nevou (It snowed — no participants) → PHENOMENON
✗ João deu (incomplete — requires recipient) → NOT PHENOMENON

Test 7 — Generic Theme role

When participants are present, is their role semantically general (not clearly Agent or Patient)?

✓ A água flui (Water flows — generic Theme, not affected, not causing) → PHENOMENON
✗ João quebrou o vaso (Agent + Patient well-specified) → CAUSATIVE