Tag names are converted to lower case in XML mode

[Fred Drake]

In XML mode, zope.tal converts tag and attribute names to lower case.

It should not.

[Fred Drake (fdrake)]

This gets to some pathos in the page template API. If we write new source for the template, and then set the content type, we get into a situation where the template won't get re-parsed, and the wrong parsing mode may be used.

Consider:

    import zope.pagetemplate.pagetemplate

    source = """\
    <?xml version="1.0" encoding='UTF-8'?>
    <xml>
      <TEST aTTr="dfsfsf"/>
    </xml>
    """

    pt = zope.pagetemplate.pagetemplate.PageTemplate()
    pt.write(source)
    pt.content_type = 'text/xml'

If instead the content_type is set first:

    pt.content_type = 'text/xml'
    pt.write(source)

or the pt_edit() API is used:

    pt.pt_edit(source, 'text/xml')

everything is updated correctly.

[Fred Drake (fdrake)]

This is an API wart for zope.pagetemplate, not a bug in zope.tal.

Since pt_edit() is the only documented external API for updating either the content type or the template source, this isn't actually a bug in zope.pagetemplate.

It may be worthwhile to provide a more intuitive interface to changing just the content type of the template.

[Fred Drake (fdrake)]

As a bug, this is invalid, since the example code that demonstrates the behavior described isn't part of the documented API.

A feature request that extends the API may be filed separately.