Metamodel reference

MetaObjects Metamodel — Providers

The metamodel is composed from concern providers. Each owns the type/subtypes it registers and may contribute attributes to types another provider owns. This is the ownership lens over the same vocabulary INDEX.md lists by type.

metaobjects-core-types

Core metaobjects metamodel types and subtypes.

Owns (registers): attr.base, attr.boolean, attr.class, attr.double, attr.expression, attr.filter, attr.int, attr.intMap, attr.long, attr.properties, attr.string, field.base, field.boolean, field.currency, field.date, field.decimal, field.double, field.enum, field.float, field.inet, field.int, field.long, field.map, field.object, field.string, field.time, field.timestamp, field.uri, field.uuid, identity.primary, identity.reference, identity.secondary, layout.base, layout.dataGrid, object.base, object.entity, object.projection, object.value, origin.aggregate, origin.base, origin.computed, origin.first, origin.passthrough, relationship.aggregation, relationship.association, relationship.base, relationship.composition, source.base, source.rdb, template.base, template.output, template.prompt, template.toolcall, validator.array, validator.atLeastOne, validator.base, validator.comparison, validator.length, validator.numeric, validator.presentIff, validator.regex, validator.required, validator.requiredWhen, view.base, view.currency

Contributes attributes:

• field.base: @default, @mutability, @required, @unique
• field.currency: @currency
• field.decimal: @precision, @scale
• field.enum: @intValueMap, @provided, @values
• field.inet: @lenient
• field.map: @objectRef, @valueType
• field.object: @objectRef
• field.string: @maxLength, @stringFormat
• field.uri: @lenient
• identity.primary: @fields, @generation
• identity.reference: @enforce, @fields, @references
• identity.secondary: @fields
• object.entity: @discriminator, @discriminatorValue
• object.projection: @filter
• origin.aggregate: @agg, @distinct, @filter, @of, @orderBy, @via
• origin.computed: @expr
• origin.first: @filter, @of, @orderBy, @via
• origin.passthrough: @convert, @from, @via
• relationship.aggregation: @cardinality, @objectRef, @onDelete, @onUpdate, @sourceRefField, @symmetric, @through
• relationship.association: @cardinality, @objectRef, @onDelete, @onUpdate, @sourceRefField, @symmetric, @through
• relationship.base: @cardinality, @objectRef, @onDelete, @onUpdate, @sourceRefField, @symmetric, @through
• relationship.composition: @cardinality, @objectRef, @onDelete, @onUpdate, @sourceRefField, @symmetric, @through
• template.output: @format, @htmlBodyRef, @kind, @maxChars, @owner, @payloadRef, @requiredTags, @since, @subjectRef, @textBodyRef, @textRef
• template.prompt: @format, @maxChars, @maxTokens, @model, @owner, @payloadRef, @promptStyle, @requiredSlots, @requiredTags, @responseFormat, @responseRef, @since, @textRef
• template.toolcall: @maxTokens, @owner, @payloadRef, @since, @toolName
• validator.array: @max, @min
• validator.atLeastOne: @fields
• validator.base: @max, @min
• validator.comparison: @left, @op, @right
• validator.length: @max, @min
• validator.numeric: @max, @min
• validator.presentIff: @equals, @field, @when
• validator.regex: @max, @min, @pattern
• validator.requiredWhen: @equals, @field, @when

metaobjects-db

DB-domain attributes — @column / @db.indexed / @dbColumnType on every field, @storage on field.object, @autoSet on temporal fields, @table/@kind/@role/@schema on source.rdb.

Contributes attributes:

• field.base: @column, @db.indexed, @dbColumnType
• field.boolean: @column, @db.indexed, @dbColumnType
• field.currency: @column, @db.indexed, @dbColumnType
• field.date: @autoSet, @column, @db.indexed, @dbColumnType
• field.decimal: @column, @db.indexed, @dbColumnType
• field.double: @column, @db.indexed, @dbColumnType
• field.enum: @column, @db.indexed, @dbColumnType
• field.float: @column, @db.indexed, @dbColumnType
• field.inet: @column, @db.indexed, @dbColumnType
• field.int: @column, @db.indexed, @dbColumnType
• field.long: @column, @db.indexed, @dbColumnType
• field.map: @column, @db.indexed, @dbColumnType
• field.object: @column, @db.indexed, @dbColumnType, @storage
• field.string: @column, @db.indexed, @dbColumnType
• field.time: @autoSet, @column, @db.indexed, @dbColumnType
• field.timestamp: @autoSet, @column, @db.indexed, @dbColumnType, @localTime
• field.uri: @column, @db.indexed, @dbColumnType
• field.uuid: @column, @db.indexed, @dbColumnType
• identity.reference: @constraintName, @onDelete, @onUpdate
• identity.secondary: @expr, @orders, @using, @where
• index.lookup: @expr, @orders, @using, @where
• source.rdb: @function, @kind, @materializedView, @parameterRef, @proc, @role, @schema, @sql, @table, @unmanaged, @view

metaobjects-documentation

Universal documentation common attrs (description / title / notes / deprecated / replacedBy / seeAlso / aliases) accepted on every metatype.

Universal attributes (every node): @aliases, @deprecated, @description, @notes, @replacedBy, @seeAlso, @summary, @title

metaobjects-prompt

Prompt / AI + serialization domain — @xmlText / @example / @instruction field markers on every field subtype, the @enumAlias/@enumDoc/@coerceDefault/@normalize tolerant-extract overlays on field.enum, and the object-level @normalize default on object.value.

Contributes attributes:

• field.base: @example, @instruction, @xmlText
• field.boolean: @example, @instruction, @xmlText
• field.currency: @example, @instruction, @xmlText
• field.date: @example, @instruction, @xmlText
• field.decimal: @example, @instruction, @xmlText
• field.double: @example, @instruction, @xmlText
• field.enum: @coerceDefault, @enumAlias, @enumDoc, @example, @instruction, @normalize, @xmlText
• field.float: @example, @instruction, @xmlText
• field.inet: @example, @instruction, @xmlText
• field.int: @example, @instruction, @xmlText
• field.long: @example, @instruction, @xmlText
• field.map: @example, @instruction, @xmlText
• field.object: @example, @instruction, @xmlText
• field.string: @example, @instruction, @xmlText
• field.time: @example, @instruction, @xmlText
• field.timestamp: @example, @instruction, @xmlText
• field.uri: @example, @instruction, @xmlText
• field.uuid: @example, @instruction, @xmlText
• object.value: @normalize

metaobjects-ui

UI/query-surface domain — @filterable / @sortable / @sortableDefaultOrder field markers driving generated CRUD filter + sort allowlists (Project D).

Contributes attributes:

• field.base: @filterable, @formExclude, @sortable, @sortableDefaultOrder
• field.boolean: @filterable, @formExclude, @sortable, @sortableDefaultOrder
• field.currency: @filterable, @formExclude, @sortable, @sortableDefaultOrder
• field.date: @filterable, @formExclude, @sortable, @sortableDefaultOrder
• field.decimal: @filterable, @formExclude, @sortable, @sortableDefaultOrder
• field.double: @filterable, @formExclude, @sortable, @sortableDefaultOrder
• field.enum: @filterable, @formExclude, @sortable, @sortableDefaultOrder
• field.float: @filterable, @formExclude, @sortable, @sortableDefaultOrder
• field.inet: @filterable, @formExclude, @sortable, @sortableDefaultOrder
• field.int: @filterable, @formExclude, @sortable, @sortableDefaultOrder
• field.long: @filterable, @formExclude, @sortable, @sortableDefaultOrder
• field.map: @filterable, @formExclude, @sortable, @sortableDefaultOrder
• field.object: @filterable, @formExclude, @sortable, @sortableDefaultOrder
• field.string: @filterable, @formExclude, @sortable, @sortableDefaultOrder
• field.time: @filterable, @formExclude, @sortable, @sortableDefaultOrder
• field.timestamp: @filterable, @formExclude, @sortable, @sortableDefaultOrder
• field.uri: @filterable, @formExclude, @sortable, @sortableDefaultOrder
• field.uuid: @filterable, @formExclude, @sortable, @sortableDefaultOrder
• layout.dataGrid: @columns, @defaultSortField, @defaultSortOrder, @filter, @filterable, @pageSize
• view.currency: @locale

metaobjects-ui-web

TS-web presentation view attrs — @rows (view.textarea) and the view.image control attrs. Applied only in TypeScript; the non-TS ports mirror the spec file but never apply this provider (the view subtypes are TS-web presentation-only).

Contributes attributes:

• view.image: @accept, @aspectRatio, @maxBytes, @maxEdge, @store
• view.textarea: @rows