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Re: [off-topic] xtext -- encoding declarations for text

• To: xml-dev@l...
• Subject: Re: [off-topic] xtext -- encoding declarations for text
• From: Richard Tobin <richard@c...>
• Date: Tue, 20 May 2003 11:21:19 +0100 (BST)
• Cc:
• In-reply-to: <019401c31e99$3041bcf0$4bc8a8c0@A...>
• Organization: HCRC, University of Edinburgh

>> Also, the fact that the first few characters depend on the application
>> will make it hard to write general transcoders.

>I had thought that too, but on thinking about it more I cannot see any 
>additional complexity compared with the XML Appendix F.  The details 
>of the algorithm are different but still it is the same three steps

[...]

> * else look for EBCDIC/ASCII signature (use string "[^a-zA-Z01-9]{1-4}xtext\b" 
>    rather than "<?xml\b"

For XML, it's only necessary to look at the first four bytes to cover
Unicode encodings, ascii supersets and ebcdic.  In the xtext case, you
will have to compare a string at several different positions or apply
a regular expression.  Certainly doable, but certainly more complex too!

-- Richard

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  • Re: [off-topic] xtext -- encoding declarations for text
    • From: "Rick Jelliffe" <ricko@a...>

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