The spec allows the escapeCharacter and escapeEscapeCharacter of DFDL escapeScheme to be expressions, in case the characters are supplied dynamically in the data stream.
However given that escape schemes are defined globally, should these properties be permitted to take relative paths in the expression?
Today the spec implicitly allows this, meaning an implementation can not entirely validate an escapeScheme annotation up front, but must validate escapeCharacter and escapeEscapeCharacter at each point of use.
I'm not sure it makes much sense for the path to be anything than absolute.

Regards

Steve Hanson
Architect, Data Format Description Language (DFDL)
Co-Chair, OGF DFDL Working Group
IBM SWG, Hursley, UK
smh@uk.ibm.com
tel:+44-1962-815848

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