layout	shorty	synopsis	status	uacp
cds-ref	Annotations	Find here a reference and glossary of common annotations intrinsically supported by the CDS compiler and runtimes.	released	Used as link target from Help Portal at https://help.sap.com/products/BTP/65de2977205c403bbc107264b8eccf4b/855e00bd559742a3b8276fbed4af1008.html

Common Annotations

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Learn more about the syntax of annotations.{.learn-more}

General Purpose

Annotation	Description	Alternatives
`@title`		`Common.Label`
`@description`		`Core.Description`

Access Control

Annotation	Description
`@readonly`	see Input Validation
`@insertonly`	see Generic Handlers
`@restrict`	see Authorization
`@requires`	see Authorization

Input Validation

Annotation	Description
`@readonly`	see Input Validation
`@mandatory`	see Input Validation
`@assert.unique`	see Input Validation
`@assert.integrity`	see Input Validation
`@assert.target`	see Input Validation
`@assert.format`	see Input Validation
`@assert.range`	see Input Validation
`@assert.notNull`	see Input Validation

Services / APIs

Annotation	Description
`@path`	see Services
`@impl`	see Reuse & Compose
`@odata.etag`	see Providing Services
`@cds.autoexpose`	see Providing Services
`@cds.api.ignore`	see OData
`@cds.query.limit`	see Providing Services
`@cds.localized`	see Localized Data
`@cds.valid.from/to`	see Temporal Data
`@cds.search`	see Search Capabilities

Persistence

Annotation	Description
`@cds.persistence.exists`	tells `compile.to.sql` this is created otherwise
`@cds.persistence.table`	tells `compile.to.sql` to create a table, not a view
`@cds.persistence.skip`	tells the compiler, this entity shall not exist in database at all
`@cds.persistence.mock`	`false` excludes this entity from automatic mocking
`@cds.on.insert`	see Providing Services
`@cds.on.update`	see Providing Services

OData

Learn more about OData Annotations in CDS.{.learn-more}

Shortcuts:

Annotation	Description
`@ValueList.entity`	see Domain Modeling
`@odata.Type`	see OData
`@odata.MaxLength`	see OData
`@odata.Precision`	see OData
`@odata.Scale`	see OData
`@odata.singleton`	see OData

Intrinsically supported OData Annotations:

Annotation	Description
`@Core.Computed`	see Providing Services
`@Core.Immutable`	see Providing Services
`@Core.MediaType`	see Media Data
`@Core.IsMediaType`	see Media Data
`@Core.IsUrl`	see Media Data
`@Capabilities...`	see Fiori
`@Common.FieldControl`	see Input Validation)