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relevance, dates and live update

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Duane Gran-2

relevance, dates and live update

Attached is a simple case for the sandbox to illustrate my question.
I have a date element with a keyDate attribute and I'm using the
relevance binding so that the display of the input for keyDate only
shows if there is content on its parent element. In other words, it
isn't desirable to have an instance document with the following:

<date keyDate="yes"/>

The problem is that the input field for keyDate doesn't display after
I've used the date picker control and presumably the date element is
populated. Am I misunderstanding the behavior of the relevant bind
operation?

Duane Gran

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relevantTest.xml (1012 bytes) Download Attachment

Erik Bruchez

Re: relevance, dates and live update

Administrator

Duane,

When you write:

<xforms:bind nodeset="/document/date/@keyDate" relevant="../date != ''"/>

"/document/date/@keyDate" points to the "@keyDate" attribute, which
becomes the context in which the "relevant" XPath expression is
executed. If you write "..", you are getting to the parent node of the
"@keyDate" attribute, which is the "date" element. But writing "../date"
would try to look for a "date" child of the other "date" element. So
simply write:

<xforms:bind nodeset="/document/date/@keyDate" relevant=".. != ''"/>

and it works.

-Erik

Duane Gran wrote:

> Attached is a simple case for the sandbox to illustrate my question. I
> have a date element with a keyDate attribute and I'm using the relevance
> binding so that the display of the input for keyDate only shows if there
> is content on its parent element. In other words, it isn't desirable to
> have an instance document with the following:
>
> <date keyDate="yes"/>
>
> The problem is that the input field for keyDate doesn't display after
> I've used the date picker control and presumably the date element is
> populated. Am I misunderstanding the behavior of the relevant bind
> operation?
>
> Duane Gran
>
>
> ------------------------------------------------------------------------
>
> <?xml version="1.0" encoding="UTF-8"?>
>
> <html xmlns="http://www.w3.org/1999/xhtml"
> xmlns:xforms="http://www.w3.org/2002/xforms"
> xmlns:xs="http://www.w3.org/2001/XMLSchema">
> <head>
> <title>relevance test</title>
> <xforms:model>
> <xforms:instance>
> <document xmlns="">
> <date keyDate=""/>
> </document>
> </xforms:instance>
> <xforms:bind nodeset="/document/date" type="xs:date"/>
> <xforms:bind nodeset="/document/date/@keyDate" relevant="../date != ''"/>
> </xforms:model>
> </head>
> <body>
> <p>
> <xforms:input ref="/document/date">
> <xforms:label>Date: </xforms:label>
> </xforms:input>
> </p>
> <p>
> <xforms:select ref="/document/date/@keyDate" appearance="full">
> <xforms:label>keyDate: </xforms:label>
> <xforms:item>
> <xforms:label>yes</xforms:label>
> <xforms:value>yes</xforms:value>
> </xforms:item>
> </xforms:select>
> </p>
> </body>
> </html>
>
>
> ------------------------------------------------------------------------
>
>
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> To unsubscribe: mailto:[hidden email]
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