The tags are either categorizing the content of the document (labels like
complex_Web_application, etc., can be thought as tags for Nuxeo), or they reflect the user feeling (
The tag service uses two important concepts: a tag object, and a tagging action. Both are represented as Nuxeo documents.
A tagging action is a link between a given document and a tag, and belongs to a given user. A tag holds a label that does not contain any:
Characters will be removed by service.
The following document types are defined by the tag service.
Tag is a document type representing the tag itself (but not its association to specific documents). It contains the usual
dublincore schema, and in addition has a specific
tag schema containing a
tag:label string field.
Tagging is a relation type representing the action of tagging a given document with a tag. (A relation type is a document type extending the default
Relation document type; it works like a normal document type except that it's not found by NXQL queries on
Document). The important fields of a
Tagging document are
relation:source which is the document id,
relation:target which is the tag id, and
dc:creator which is the user doing the tagging action.
Tagging documents managed by the tag service are unfiled, which means that they don't have a parent folder. They are therefore not visible in the normal tree of documents; only queries can find them. In addition they don't have any ACLs set on them, which means that only a superuser (and the tag service internal code) can access them.
The tag service is accessed through the
The tag service allows you to:
- Tag and untag a document
- Get all the tags for a document
- Get all the documents for a tag
- Get the tag cloud for a set of documents
- Get suggested tags for a given tag prefix
The tags are duplicated:
- From the live document when creating a version
- From a version when creating a proxy
When restoring a version, the tags on the live document are also restored from the ones on the version.
Tags can be added and removed independently on live documents, versions and proxies: a tag added on a live document won't be added on all its versions, but only on the versions that will be created after. The same behavior is applied for proxies.
The logic for the above is in the
To disable the duplication of tags on versions and proxies, the
TaggedVersionListener may be disabled with the following contribution:
<require>org.nuxeo.ecm.platform.tag.service.listener</require> <extension target="org.nuxeo.ecm.core.event.EventServiceComponent" point="listener"> <listener name="taggedVersionListener" enabled="false" /> </extension>