Module exceptions

I define exceptions used in the model implementation.

Classes

ModelError
Integrity constraints of the Advene model have been violated.

NoClaimingError
Raised whenever no backend nor parser claims a package URL.

NoSuchElementError
Raised whenever an element cannot be found in a package.

UnreachableImportError
Raised whenever an element from an unreachable import is sought.

NoContentHandlerError
Raised whenever a content can not be handled (view, query....).

ContentHandlingError
Raised whenever a content handler has an internal error.