Rule modes

These affect the internal workings

--mode=<flags>

where flags are from

 e   Errors loading schemas of definitive documents are fatal
 m   Schemas and definitive documents laoded are merged
     into the meta knowledge
     (otherwise they are consulted independently)
 r   Needed to enable any remote stuff.
 s   Read the schema for any predicate in a query.
 u   Generate unique ids using a run-specific URI

If cryptographic functions will be used, then the --crypto flag must be given on the command line, to force the import of the crypto libraries which are not always available.