prefix.name.suffix
| att | an attribute class | e.g. att.global |
| model | a model class | e.g. model.global |
| xxxPart (parent) | elements which can appear
interchangeably within a <xxx> | e.g. model.pPart |
| xxxLike (prototype) | elements which can appears in the same
contexts as a <xxx> | e.g. model.pLike |
| xxxPart.foo | the subclass of xxxParts forming the semantic class foo | e.g. model.pPart.edit |
