Hi
in OrientDB you can obtain schema information with
select expand(classes) from metadata:schema
or from java API with db.getMetadata().getSchema() and this will give you
all the information about classes, properties and indexes
You can also add custom metadata to classes and properties using the CUSTOM
attribute (eg. property.setCustom("name", "value"), maybe this could be a
help for your needs.
Luigi
2015-04-01 13:46 GMT+02:00 mindplay.dk <[email protected]>:
> MySQL has the "information_schema" database, which contain the metadata
> for the actual database.
>
> Does OrientDB internally use a database/tables to store the schema
> metadata?
>
> If so, is this exposed somehow?
>
> And if so, are you allowed to tinker with this schema?
>
> What I'm thinking is, the Orient data-model is rich enough to support
> fully automated generation of meaningful user interfaces for data
> administration, even for schema-less data there is type information since
> we have no "foreign keys" that are just numbers which need to be defined
> and resolved.
>
> If I could add, say, a custom datatype-property to the property-schema, I
> could designate string-properties as e.g. e-mail address, hex color-code,
> IP address, etc. allowing for meaningful user interface generation, input
> validation, etc.
>
> Effectively, this would enable us to leverage OrientDB as a kind of CMS.
>
> Of course, I could add my own metadata-table for this information,
> associating e.g. "{class-name}.{property-name}" with metadata... but both
> class-names and property-names can change, so this would work better if
> properties in the schema actually had RIDs to which I could associate these
> links.
>
> Anyway, getting ahead of myself here - are properties actually records
> with RIDs somewhere underneath the hood, and is there any way to get at
> this information?
>
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