[DFDL-WG] Subsetting the DFDL spec

[Steve Hanson]

Some thoughts about subsetting the DFDL spec to make it more consumable 
for readers and implementors.

We need to decide how the use of a subset is indicated in a DFDL xsd.   It 
can be implicit by the properties referenced, or explicit up front.  The 
difference is best illustrated by an example. Let's say Bidi support is a 
subset and I don't want to use Bidi.  If using the implicit method, then I 
still need the dfdl:textBidi property to be set to 'no' even when in 
subset mode because the same xsd could be used by a full DFDL processor 
and it will expect a value.  If using explicit, then I don't need to set 
the dfdl:textBidi property at all, because the DFDL processor will never 
look for it unless the xsd is switched to include that subset.

Here's a straw man for some subsets.



Regards

Steve Hanson
Strategy, Common Transformation & DFDL
Co-Chair, OGF DFDL WG
IBM SWG, Hursley, UK,
smh at uk.ibm.com,
tel +44-(0)1962-815848





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