[DFDL-WG] Escape scheme properties that can be expressions

[Steve Hanson]

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 at uk.ibm.com
tel:+44-1962-815848





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