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getting group (XPath) relevance binding to work in an <xf:label /> tag

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Alex Bleasdale

getting group (XPath) relevance binding to work in an <xf:label /> tag

Hi -

I had a quick question and just wanted to see whether anyone else in this forum had noticed a similar situation. Within an XForm, I can do this:

<xhtml:p>
<xf:group ref=".[count(/items/item) > 1]">
Items
</xf:group>

<xf:group ref=".[count(/items/item) < 2]">
Item
</xf:group>
</xhtml:p>

And it works perfectly :)

However, I was hoping I could add similar code inside an <xf:label> tag, so idea would be that the label would dynamically update when multiple 'item's are found in the instance.

As the code works on its own I'm wondering whether this kind of thing isn't allowed within <xf:label /> tags or whether there is another way to achieve this effect (XPath 2.0 notation perhaps?) Has anyone else added dynamically updating content inside an <xf:label /> before?

Any ideas would be greatly appreciated as always - thanks :)

fl.schmitt(ops-users)

Re: getting group (XPath) relevance binding to work in an <xf:label /> tag

Hi Alex,

> As the code works on its own I'm wondering whether this kind of thing isn't
> allowed within <xf:label /> tags or whether there is another way to achieve
> this effect (XPath 2.0 notation perhaps?) Has anyone else added dynamically
> updating content inside an <xf:label /> before?

i think you can't use the technique of xforms:group as you've shown for
xforms:label. The easiest solution in your case is IMHO to use the xpath if
function inside a xforms:output:

<xforms:label>
<xforms:output
value="if (count(/items/item) lt 2)
then 'single'
else 'multiple'" />
</xforms:label>

HTH
florian

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David McIntyre

Re: getting group (XPath) relevance binding to work in an <xf:label /> tag

In reply to this post by Alex Bleasdale

Hi Alex,

There are a couple of things you could try. One is to use a ref
attribute on the label, something like

<xf:label ref="if (count(/items/item) > 1) then /labels/myLabelMany
else /labels/myLabelOne"/>

The other is to put an output inside the label, with a suitable value
attribute, such as

<xf:label><xf:output value="if (count(/items/item) > 1) then 'Items'
else 'Item'"/></xf:label>

The first approach is nice and neat but only works if you have an
instance node to point to: the second approach can use any XPath
expression, including string literals or combining values at different
locations.

Cheers,

Dave

Alex Bleasdale wrote:

> Hi -
>
> I had a quick question and just wanted to see whether anyone else in this
> forum had noticed a similar situation. Within an XForm, I can do this:
>
>
> <xhtml:p>
> <xf:group ref=".[count(/items/item) > 1]">
> Items
> </xf:group>
>
> <xf:group ref=".[count(/items/item) < 2]">
> Item
> </xf:group>
> </xhtml:p>
>
> And it works perfectly :)
>
> However, I was hoping I could add similar code inside an <xf:label> tag, so
> idea would be that the label would dynamically update when multiple 'item's
> are found in the instance.
>
> As the code works on its own I'm wondering whether this kind of thing isn't
> allowed within <xf:label /> tags or whether there is another way to achieve
> this effect (XPath 2.0 notation perhaps?) Has anyone else added dynamically
> updating content inside an <xf:label /> before?
>
> Any ideas would be greatly appreciated as always - thanks :)
>

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