1 from yams.buildobjs import EntityType, String, SubjectRelation, RelationType

     2 

     3 

     4 class Tag(EntityType):

     5     """tags are used by users to mark entities.

     6     When you include the Tag entity, all application specific entities

     7     may then be tagged using the "tags" relation.

     8     """

     9     name = String(required=True, fulltextindexed=True, unique=True,

    10                   maxsize=128)

    11     # when using this component, add the Tag tag X relation for each type that

    12     # should be taggeable

    13     tags = SubjectRelation('Tag', description="tagged objects")

    14 

    15 

    16 class tags(RelationType):

    17     """indicates that an entity is classified by a given tag"""