---
id: CE-WP-0012
type: workplan
title: "Attribute value types — time, datetime, amount, one-of, some-of"
domain: infotech
repo: citation-evidence
repo_id: a677c189-b4e2-4f2a-9e48-faa482c277e6
topic_slug: citation_evidence_mvp
topic_id: cee7bedf-2b48-46ef-8601-006474f2ad7a
status: finished
owner: codex
created: "2026-07-30"
updated: "2026-07-30"
depends_on_workplan: CE-WP-0011
planning_order: 12
planning_priority: high
spec_refs:
  - wiki/AttributeValueTypes-proposal.md
  - workplans/CE-WP-0010-annotate-attributes-ux.md
  - ../info-tech-canon/seeds/InfoTechCanonDataModel_RC1_seed.md
state_hub_workstream_id: "46704d45-5ee2-5f8d-a0e7-ddeb931ffa27"
---

# CE-WP-0012 — Attribute Value Types

Extend Capture attributes beyond `text` / `textarea` / `date` with the types
needed for real evidence work, aligned with a **canonical AttributeValueType
catalog** (proposed under InfoTechCanon; interim consumer profile in
`wiki/AttributeValueTypes-proposal.md`).

## Research summary (locked finding)

InfoTechCanon **Data Model** already defines **Attribute**, **Field**,
**DataType**, **Representation**, and **CodeList**, but **DataType is a stub**
and there is **no closed catalog** of application value types. Representation
only lists open examples (`string`, `date`, `timestamp`, `code`, …).

Therefore: establish the catalog in InfoTechCanon (ITC-WP-0013), implement UI
and persistence here as a **consumer**.

## User-requested types (MVP slice)

| Type | Purpose |
|------|---------|
| `time` | Clock time without date |
| `datetime` | Date + time |
| `amount` | Quantity with currency (or unit) |
| `one-of` | Single choice from options |
| `some-of` | Multi choice from options |

Keep existing: `text`, `textarea` (alias `text-long`), `date`.

## Goals

1. Schema + UI support for the MVP types above.
2. Option lists for `one-of` / `some-of` editable in Capture.
3. Wire encoding documented and round-tripped in capture-state + tests.
4. No fork of type ids: prefer names from `wiki/AttributeValueTypes-proposal.md`
   once ITC catalog exists; until then use the proposal as interim canon.

## Non-goals

- Full ISO 11179 registry product.
- Arbitrary JSON Schema forms.
- Server-side validation service.
- Publishing a shared npm package in this workplan (may follow).

## Dependency order

```
T01 (decide wire encodings + finalize interim catalog in wiki)
  └─ T02 (extend FormFieldSchema + FieldDefinitionForm types)
       └─ T03 (widgets: time, datetime, amount)
            └─ T04 (widgets: one-of, some-of + options editor)
                 └─ T05 (persist options; migrate legacy textarea if needed)
                      └─ T06 (tests + demo schema examples)
```

Parallel: **ITC-WP-0013** formalizes the catalog in info-tech-canon; CE may
ship T01–T06 against the wiki proposal and remap ids if ITC renames.

---

## T01 — Finalize interim catalog + encodings

```task
id: CE-WP-0012-T01
status: done
priority: high
state_hub_task_id: "2df0deb2-0e99-591d-9de1-36c98789c741"
```

Resolve decision asks in `wiki/AttributeValueTypes-proposal.md` §8 with
operator; freeze MVP wire forms for amount / one-of / some-of.

**Acceptance:** proposal §4 marked “accepted for CE MVP” (or amended).

---

## T02 — Schema extension

```task
id: CE-WP-0012-T02
status: done
priority: high
depends_on: [T01]
state_hub_task_id: "6f2369e8-aa52-5540-9362-19d558a17637"
```

Extend `FormFieldSchema` / `FieldType` in evidence-binder:

- add `time`, `datetime`, `amount`, `one-of`, `some-of`
- optional `options?: { id, label }[]` for choice types
- optional amount metadata (default currency) if needed

**Acceptance:** typecheck green; FieldDefinitionForm lists new types.

---

## T03 — Scalar widgets (time, datetime, amount)

```task
id: CE-WP-0012-T03
status: done
priority: high
depends_on: [T02]
state_hub_task_id: "18f3c81f-5f52-5635-bd75-9748c748e49b"
```

Render HTML `time`, `datetime-local` (or split date+time), and amount UI.
Values persist as strings (or structured JSON for amount per T01).

**Acceptance:** add/edit/value round-trip for each type in DOM tests.

---

## T04 — Choice widgets (one-of, some-of)

```task
id: CE-WP-0012-T04
status: done
priority: high
depends_on: [T02]
state_hub_task_id: "975de5c5-61a3-5efb-b97c-fcaa0792fd85"
```

- `one-of`: select or radio
- `some-of`: checkbox group
- options editor when defining the attribute

**Acceptance:** create attribute with options, select values, persist.

---

## T05 — Capture-state compatibility

```task
id: CE-WP-0012-T05
status: done
priority: medium
depends_on: [T03, T04]
state_hub_task_id: "299c534b-627f-5072-840c-1c209a615af7"
```

- load/save options in capture-state
- accept legacy sessions without options
- document amount/some-of JSON in capture-persistence comments

---

## T06 — Tests + demo attributes

```task
id: CE-WP-0012-T06
status: done
priority: medium
depends_on: [T05]
state_hub_task_id: "1364d9f5-8ff8-59dc-bb8c-c5683add4b66"
```

- unit/DOM coverage for new types
- optional demo schema fields exercising amount + one-of
- `pnpm test` green

---

## Out of scope / follow-ups

- Align TypeScript const enum with published ITC YAML.
- Evidence extraction helpers that suggest amount/date from PDF quotes.
- Validation constraints (min/max, regex) as first-class UI.