>> [...] My proposal is to add a new relation modifier to the CQL context set
>> called, for example, 'level'

> I like this, assuming that the semantics of "level" would say something
> like: "in the absence of the 'level' relation modifier or when the value
> for the designated level modifier is unknown to the server, then the
> application of the level modifier in the search is 'server choice' ".

For absence it should definitely be server choice (explainable in ZeeRex,
and recommended default be the lowest level of data) but for unknown it
should be an error condition, raising a diagnostic.

Rob

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