Metadata - meta-data for content items, and how to use it
The <wmmeta> Tag - defining meta-data inside the tagged content object
The <metatable> Tag - Attach metadata to another content item
The <metadefault> Tag - Specify default metadata to attach to content
The <attrdefault> Tag - Specify default attributes for content items
The <metaset> and <usemetaset> Tags - Define your own metadata names
