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RE: Should attributes be prefixed

• To: "Doug Ransom" <Doug.Ransom@p...>,"Xml-Dev@Lists. Xml. Org (E-mail)" <xml-dev@l...>
• Subject: RE: Should attributes be prefixed
• From: "Evan Lenz" <elenz@x...>
• Date: Tue, 20 Nov 2001 13:37:05 -0800
• Importance: Normal
• In-reply-to: <3C552E6ED5B7DC4F8BF603C030BB70BF3E2843@H...>

Uh oh, here we go again.

I like to follow the convention that XSLT uses: when attributes are "owned"
by the element, don't put it in a namespace. It's already sufficiently
scoped by the owner element.

For example:

<xsl:element name="foo" use-attribute-sets="bar"/>

But when you want to use an attribute on "someone else"'s element, i.e. in a
different namespace (for example, in XSLT, on a literal result element),
then put your attribute in your namespace so as to distinguish it from an
attribute owned by that element.

For example:

<myElement myAttribute="lala" xsl:use-attribute-sets="bar"/>

The upshot is that attributes aren't usually in a namespace, except in
special cases like these.

This isn't the only approach. (See subsequent flames.)

Evan Lenz
XYZFind Corp.

-----Original Message-----
From: Doug Ransom [mailto:Doug.Ransom@p...]
Sent: Tuesday, November 20, 2001 1:17 PM
To: Xml-Dev@Lists. Xml. Org (E-mail)
Subject:  Should attributes be prefixed


When should attributes be prefixed and included in a namespace, and when
should attributes reside globally.

i.e. global attribute <V units="Volts" xmlns="mailto:Doug.Ransom@p..."/>
vs attribute in the namespace
    <p:V p:units="Volts" xmlns:p="mailto:Doug.Ransom@p..."/>

In both cases, the units value must exist within the V element for the
element to be valid.

Doug Ransom

Software Engineer/Internet Technologies Domain Lead
Power Measurement
mailto:Doug.Ransom@p...
tel:250-652-7100 x 7558
fax:250-652-0411
Request My VCard

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    • From: Doug Ransom <Doug.Ransom@p...>

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