should support schema dereferencing before validation

[roll]

http://frictionlessdata.io/specs/implementation/

On dereferencing and descriptor validation

Some properties in the Frictionless Data specifications allow a path (a URL or a POSIX path) that resolves to an object.

The most prominent example of this is the schema property on Tabular Data Resource descriptors.

Allowing such references has practical use for publishers, for example in allowing schema reuse. However, it does introduce difficulties in the validation of such properties. For example, validating a path pointing to a schema rather than the schema object itself will do little to guarantee the integrity of the schema definition. Therefore implementors MUST dereference such "referential" property values before attempting to validate a descriptor. At present, this requirement applies to the following properties in Tabular Data Package and Tabular Data Resource:

• schema
• dialect

[OriHoch]

not supported