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You can see the cid (citeable identifier) of a resource for example on the Email Colleague Tab for a resource.
Simple
http://www.openehr.org/knowledge#showArchetypeckm#showArchetype_cidArchetype
http://www.openehr.org/knowledge#showTemplateckm#showTemplate_cidTemplate
http://www.openehr.org/knowledge#showTermsetckm#showTermset_cidTermset
The cidArchetype, cidTemplate, cidTermset are the citeable identifiers of the resource.
For example: http://www.openehr.org/knowledge#showArchetypeckm#showArchetype_1013.1.130 for the Blood pressure archetype.
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