The xml-stylesheet Processing Instruction
The stylesheet associated with a document is indicated by an xml-stylesheet
processing instruction in
the document’s prolog, which comes after the XML declaration but
before the root element start-tag. This processing instruction uses
pseudo-attributes to describe the stylesheet (that is, they look
like attributes but are not attributes because xml-stylesheet
is a processing instruction
and not an element).
The required href and type pseudo-attributes
There are two required pseudo-attributes for xml-stylesheet
processing instructions.
The value of the href
pseudo-attribute gives the URL, possibly relative,
where the stylesheet can be found. The type
pseudo-attribute value specifies the MIME media type of the stylesheet, text/css
for cascading stylesheets, application/xml
for XSLT stylesheets. In Example 7-3, the xml-stylesheet
processing instruction
tells browsers to apply the CSS stylesheet person.css to this document before
showing it to the reader.
<?xml version="1.0"?> <?xml-stylesheet href="person.css" type="text/css"?> <person> Alan Turing </person>
Tip
Microsoft Internet Explorer uses type="text/xsl
" for XSLT stylesheets.
However, the text/xsl
MIME media type has not been and will not be
registered with the IANA. It is a figment of Microsoft’s imagination.
In the future, application/xslt+xml
will be
registered to identify XSLT stylesheets specifically.
In addition to these ...
Get XML in a Nutshell, 3rd Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.