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Subject: [ubl-ndrsc] Proposed text for character set/encoding requirements
At the F2F, I agreed to "Propose some declarative text describing XML's
minimum character set/character encoding expectations and saying that
UBL has the same minimum mandatory-to-implement expectations." Here is
an attempt that I hope Mavis will be able to squeeze into the NDR
document for consideration. If there are no emailed comments by next
week, let's plan to accept it:
According to the XML Recommendation [XML], the legal characters in XML
character data are tab, carriage return, line feed, and the legal
characters of Unicode and ISO/IEC 10646, as these standards are updated
from time to time. It further notes that "The mechanism for encoding
character code points into bit patterns may vary from entity to entity"
and requires all XML processors (parsers) to accept the UTF-8 and UTF-16
encodings of 10646. UBL has the same requirements for legal characters
in XML instance documents and the same minimal requirements for
character encoding support in UBL-aware software. Trading partners may
agree on other character encodings to use among themselves. It is
recommended in any case that encoding declarations be provided in the
XML declarations of UBL documents.
Eve
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Eve Maler +1 781 442 3190
Sun Microsystems NEW!!! cell +1 781 354 9441
Web Technologies and Standards eve.maler @ sun.com
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