That paragraph was faulty. I checked in a new version of the Tutorial PDF that fixes this.
-Erik
Bill Winspur wrote:
The following code fragment from page 14 of the OXF Tutorial shows how to copy the content
of the ask-name page's form's first-name to the display-name page's form's first name.
<page id="ask-name" path-info="/tutorial-hello4"
xforms="xforms-model.xml"
view="ask-name-view.xhtml">
<action when="/myform/action = 'next'">
<result page="display-name">
<xu:update select="/myform/first-name">
<xu:value-of select="document('oxf:instance')/myform/first-name"/>
</xu:update>
</result>
</action>
</page>
As I understand <xu:update>, its content (picked up in this case by the inner <xu:value-of> element),
replaces the value at the location specified by the <update>'s select attribute.
If this is correct, then in the above fragment:
a) the select attr of the <update> is interpreted against the display-name page's form,
since that is where the data will be inserted, and
b) the select attr of the <value-of> is interpreted against the ask-name page's form,
since that is where the data is obtained.
Again, if I understand xu:update, the following explanation in the tutorial:
/To access the content of this new XForms instance in the display-page, the construct document('oxf:instance') must be used.
/seems wrong, since (from b, above) the construct is apparently used to access the ask-name page.
What is wrong with my argument?
Bill Winspur Manager, Wynnon Systems Inc Mobile: 403-519-5889
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