[DFDL-WG] Implementation limits

[Steve Hanson]

Just checking - did we close on this?

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
----- Forwarded by Steve Hanson/UK/IBM on 21/01/2013 18:38 -----

From:   Mike Beckerle <mbeckerle.dfdl at gmail.com>
To:     Steve Hanson/UK/IBM at IBMGB, 
Cc:     dfdl-wg at ogf.org
Date:   19/11/2012 21:08
Subject:        Re: [DFDL-WG] proposed clarification/narrowing - no 
twos-complement decimal, integer or nonNegativeInteger



Do we have a section where this goes?

There are lots of implied implementation limits.

Maximum string length?
Maximum hexbinary length?
Maximum number of packed digits in various numbers.

Maximum length of a delimiter?
Maximum length of a fixed attribute?
Maximum length of a pattern regex expression?
Maximum length of a regular expression?

There's also limits on buffering of data for unparsing, etc.

There's also limits on lookahead/speculation. I.e., how far an 
implementation is willing to speculate forward.

etc.

For some types these are clear: e.g., binary xs:int is 32 bits max. 

Do we need a numbered section on implementation specific limits.

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