Here are some ideas for extending the description of attributes. To more clearly specify attributes, a new new class 'attribute' should be added to OCCI Core. For the class diagram this would require to remove '+ attributes :Set<String>' from category and instead connect it with the attribute class in a many to one dependency. Ideas for the attribute class: - the attribute class should consist of the attributes: mutable, required, type, default - the naming of attributes of the OCCI specification MUST start with occi followed by term and the attribute name (e.g. occi.compute.cores) - the naming of attributes of user defined mixins MUST start with the reversed domain name of the mixin scheme followed by the term and the attribute name (e.g. com.example.my_mixin.my_attribute) - the attribute type should contain restrictions on the attribute like for example: * string: choices, min_length, max_length * number: bounds (one or more lower and upper bounds) - there might be more detailed attribute types such as URL or URI, float, integer, ... --Florian ------------------------------------------------------------------------------- GWDG - Gesellschaft für wissenschaftliche Datenverarbeitung mbH Göttingen Am Fassberg 11, 37077 Göttingen Fon: 0551 39-20364 Fax: 0551 201-2150 E-Mail: florian.feldhaus@gwdg.de WWW: www.gwdg.de ----------------------------------------------------------------------------------- Geschäftsführer: Prof. Dr. Ramin Yahyapour Aufsichtsratsvorsitzender: Prof. Dr. Christian Griesinger Sitz der Gesellschaft: Göttingen Registergericht: Göttingen Handelsregister-Nr. B 598 -----------------------------------------------------------------------------------