= Metadata API

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The metadata APIs provide access to the framework's internal metamodel.
These are generally of use to support development-time activities, for example creating custom UIs through Swagger.


.Metadata API
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|===

|API
|Description


|xref:refguide:applib:index/services/appfeat/ApplicationFeatureRepository.adoc[ApplicationFeatureRepository] & xref:refguide:applib:index/services/appfeatui/ApplicationFeatureMenu.adoc[ApplicationFeatureMenu]

|Provides access to string representations of the features (package, class, class members) of the domain classes within the metamodel.


|xref:refguide:applib:index/services/layout/LayoutService.adoc[LayoutService] &
xref:refguide:applib:index/services/layout/LayoutServiceMenu.adoc[LayoutServiceMenu]
|Use to obtain the resolved `Xxx.layout.xml` for a class, and the top-level `menubars.layout.xml` files.


|xref:refguide:applib:index/services/metamodel/MetaModelService.adoc[MetaModelService] & xref:refguide:applib:index/services/metamodel/MetaModelServiceMenu.adoc[MetaModelServiceMenu]
|Access to certain information from the Apache Isis metamodel.


|xref:refguide:applib:index/services/sitemap/SitemapService.adoc[SitemapService] & xref:refguide:applib:index/services/sitemap/SitemapServiceMenu.adoc[SitemapServiceMenu]
|Access to a downloadable site map of the application's features, as an Asciidoc document.

The intention is to use this as the basis for a user guide or to develop a manual regression test plan.


|xref:refguide:applib:index/services/swagger/SwaggerService.adoc[SwaggerService]
|Exports link:http://swagger.io/[Swagger] spec files, eg to generate link:http://swagger.io/swagger-codegen/[client-side stubs] for use in a custom REST client.



|===


