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[Bug 28299] [XDM3.1] 2.5.1 Predefined Schema Types - incorrect list

From: <bugzilla@jessica.w3.org>
Date: Thu, 16 Jul 2015 19:07:49 +0000
To: public-qt-comments@w3.org
Message-ID: <bug-28299-523-ugWefIrb9W@http.www.w3.org/Bugs/Public/>
https://www.w3.org/Bugs/Public/show_bug.cgi?id=28299

--- Comment #3 from Michael Kay <mike@saxonica.com> ---
We decided that the types in the XS namespace could be classified as follows
and that the section should be recast along these lines:

The data model adopts the following types from [Schema 1.0 Part 2]:

19 primitive types...
NN derived types...
3 built-in list types xs:NMTOKENS, IDREFS, ENTITIES

It further defines the following types which were originally defined in XDM 1.0
and were subsequently adopted by XSD 1.1:

xs:anyAtomicType
xs:dayTimeDuration
xs:yearMonthDuration

In the case of a processor that "supports" XSD 1.1 the data model also
includes:

the new union type xs:error (a type with no instances)
the new derived type xs:dateTimeStamp

The following types, although they use the xs namespace, are defined here in
XDM and not in XSD:

xs:untypedAtomic
xs:numeric, a union type whose members are xs:double, xs:float and xs:decimal

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