Re: Action: Steven to propose wording for the 3-way split for output @mediatype

I see that <output/> has a binding restriction: Data Binding Restrictions: 
Binds to any simpleContent 
<https://www.w3.org/community/xformsusers/wiki/XForms_2.0#def-simpleContent>
  or an atomic value.


This clearly has to be dropped.


Steven


On Friday 29 August 2025 13:46:23 (+02:00), Steven Pemberton wrote:



 >

 > One thing to be decided that we don't yet define, is what event to send 
in the case that dereferencing a URI fails.

 >

 > For <instance src=""/> we use xforms-submit-error (which is non-fatal).

 >

 > For <instance resource=""/> we use xforms-link-error (which is fatal).

 >

 > I favour a non-fatal error in this case, I think.

 >

 > Steven

 >

 >

 > On Friday 29 August 2025 13:17:56 (+02:00), Steven Pemberton wrote:

 >

 > > Here is a first attempt.

 > > > Steven

 > > > Data is obtained by evaluating the value attribute if present, or 
otherwise from the Single Item Binding if present, and otherwise from the 
inline data.
 > > > A mediatype is obtained from the mediatype attribute if present, or 
otherwise from the mediatype child element if any.

 > > > * If the type of the data is xs:anyURI, xf:absoluteIRI, or 
xf:httpIRI, it is dereferenced, and the result is the data to be rendered; 
if no mediatype has been specified, the Content-type of the returned data 
is used.

 > > > * If the type of the data is xs:base64Binary or xs:hexBinary, it is 
decoded accordingly, to give the data to be rendered.

 > > > * Otherwise the data itself is the data to be rendered.

 > > > If the data to be rendered is non-empty, it is rendered in a 
suitable way taking into account the datatype of the value, the mediatype 
if any, the appearance attribute, and localization and internationalization 
issues such as representation of numbers and dates.

 > > > Implementations should accept mediatypes of at least image/* 
(including SVG), text/html, application/xhtml+xml, and 
application/mathml+xml as possible values of mediatype.

 > > > The data is rendered on XForms initialization, and re-rendered 
whenever there is a change in any node to which the binding or expression 
refers, or if the mediatype changes.

 > > > Note. Types are obtained from instance data, or from a property on 
the control. Therefore

 > > > <instance>

 > > <data xmlns="">

 > > <link>http://example.com/value</link>

 > > </data>

 > > </instance>

 > > <bind ref="link" type="anyURI"/>

 > > ...

 > > <output ref="link"/>

 > > > will cause the URI to be dereferenced, and the resulting data to be 
rendered. However, > <output value="link"/>

 > > > will cause the string <code>http://example.com/value</code> to be 
output, since the type of a <code>value</code> attribute is 
<code>string</code>.

 > > > In that case, you have to add a <code>type</code> attribute to the 
control:

 > > > <output value="link" type="anyURI"/>

 > > > {Examples to include an SVG example. They already include an HTML 
example.}

 > > >

 >