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Re: XSLT 3.0: Question about the meaning of <xsl:mode

Subject: Re: XSLT 3.0: Question about the meaning of <xsl:modetyped="unspecified"/>
From: "Michael Kay mike@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 2 Jan 2015 22:20:26 -0000
 Re: XSLT 3.0: Question about the meaning of  <xsl:mode
The values yes | no | typed | untyped all impose contraints; they cause errors
to be reported if certain conditions apply.

Omitting the attribute, or specifying "unspecified", imposes no contraints. So
in a sense, this value has no effect; there are no semantics to be explained.
However, I agree that it would be useful to say so explicitly.

Michael Kay
Saxonica
mike@xxxxxxxxxxxx
+44 (0) 118 946 5893




On 30 Dec 2014, at 02:48, Dimitre Novatchev <dnovatchev@xxxxxxxxx> wrote:

> The 2nd Last Call of the W3C XSLT 3.0 specification lists the
> attributes of the <xsl:mode> declaration and their possible values.
>
> In Section "6.6.1 Declaring Modes"
> (http://www.w3.org/TR/2014/WD-xslt-30-20141002/#declaring-modes), the
> possible values of the "typed" attribute are enumerated as:
>
>   typed? = boolean | "strict" | "lax" | "unspecified"
>
> Here it is also said that the default value for this attribute is
"unspecified".
>
> These values are discussed in section "6.6.3 Declaring the Type of
> Nodes Processed by a Mode"
> (http://www.w3.org/TR/2014/WD-xslt-30-20141002/#xsl-mode-typed).
>
> It is explained what the two possible Boolean values mean, and that
> the values  "strict" and "lax" imply the Boolean true() and add some
> nuances to it.
>
> However, there is no mention of the default value "unspecified" and
> thus it is not known what this value exactly means.
>
> My question is:
>
>  What is the meaning of the value "unspecified" of the "typed"
> attribute of <xsl:mode> and how it is different from specifying the
> Boolean value false() ("no", 0 or "false").
>
> Have I missed an existing description of this, or does such
> description need to be added?
>
>
> --
> Cheers,
> Dimitre Novatchev

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