XForms namespace for XPath functions

Original post from MichaelKay:

Date: Mon, 23 Apr 2007 23:49:32 +0200
To: www-forms-editor@w3.org
Subject: 7.6
From: "Michael Kay" <mike@saxonica.com>
Cc: "'XQuery'" <w3c-xml-query-wg@w3.org>, "'XSL WG'" <w3c-xsl-wg@w3.org>


    H. Clearly there is a need to provide backwards compatibility with
    XForms 1.0 in the set of additional functions provided. (It's a
    shame that these weren't defined to be in their own
    namespace). However, we would also like to see some kind of
    migration strategy that moves users forward to the XPath 2.0
    replacements for these functions where these exist. For example,
    xs:boolean() in XPath 2.0 is identical to boolean-from-string() in
    XForms.  (On a point of detail, the values "true" and "false" in
    XML Schema are case-sensitive whereas this function is described as
    case-insensitive).

    A possible migration strategy might start by putting these
    functions in a separate namespace, and giving users some way to
    select the function namespaces they want to use in their
    application.

    We have not actually checked how many of the additional functions were
    already defined in XForms 1.0.

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