The most basic of links in WebCGM is a simple hyperlink pointing at a one-picture WebCGM file, with no object targetting, and with no behaviors specified.
Object-targetted hyperlinks are more specific, in that one or more objects can be selected in the target picture. A single object can be selected by id (parameter on APS) or name (value of 'name' APS Attribute), and multiple objects can be selected by name.
Specification of viewer behavior upon object selection is permitted via an object behavior parameter in the "#" fragment of the link URI specification. Three values are supported:
To activate and test a HTML-to-CGM link, with "view_context" object behavior: