Schema for an ISO2146 collections and services registry Activity object. ISO2146 states that development of an Activity profile still needs exploration. My feeling is this should be omitted from the schema at this point (ISO2146 4.2). Suggest something similar to METS mdWrap for profile metadata, see Collection schema for example. Wrapper element for descriptive and administrative metadata for an activity registry object. Primary and alternative identifiers for an activity. The value of the <key> element may be repeated, or any additional (local or global) identifiers described. Each identifier must be represented in its own identifier element. The name of the party in either a simple or compound form. Location(s) relevant to the activity. A location element should contain information about a single location (e.g. activity web site). Element for holding information about a related registry object. A subject category into which the activity falls or the activity is related. Multiple subjects must be represented via separate subject elements. A textual description or URI resolving to a description relevant to the ativity. Any URI pointing to information related to the activity.