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RE: Defining Xlink in XMLschema

• To: 'C Baines' <cbaines@w...>, xml-dev@l...
• Subject: RE: Defining Xlink in XMLschema
• From: Micah Dubinko <MDubinko@c...>
• Date: Sat, 17 May 2003 13:02:09 -0700

A word of caution (not about XLink specifically):

The namespace you used in your example,
http://www.w3c.org/1999/xlink
is NOT the namespace for XLink. You have an extra 'c' character. Conforming
processors are allowed (and likely) to ignore things not in the official
namespace. A difference of even a single character changes everything.

It should be:
http://www.w3.org/1999/xlink

Confusingly, if you access the first (incorrect) namespace URL with a
browser, you still get to an HTML page that says:

"This is an XML namespace defined in the XML Linking Language (XLink)
specification."

IMHO, Using URIs as a basis for namespaces works well for the qualities of
persistence and uniqueness, but the technique causes serious usability
problems due to all the extra baggage associated with URIs/URLs.

Thanks,

.micah


-----Original Message-----
From: C Baines [mailto:cbaines@w...]
Sent: Saturday, May 17, 2003 10:10 AM
To: xml-dev@l...
Subject:  Defining Xlink in XMLschema


Hi

Can anyone help me with these questions?

If I wanted to include inline xlinks within a document e.g.

<rhyme>The <link xmlns:xlink="http://www.w3c.org/1999/xlink"
xlink:href="cat.png" xlink:show="new" xlink:title="cat">cat</link> sat on
the mat</rhyme>

1.    Presumably <rhyme> and any other elements containing <link> need to be
mixed elements declaring <link> as a child in the schema - but is there a
way of declaring <link> just once in the schema so that it can be used
within any elements at random?

2.    (Main question) Do I still have to declare the xlink attributes in the
schema, i.e. href, show and title, or is this unnecessary because I have
declared the Xlink namespace within <link> already?

Thanks

Charles


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