Comments on: Namespaces in XML http://tenderlovemaking.com/2009/04/23/namespaces-in-xml/ The act of making love, tenderly. Thu, 04 Mar 2010 14:03:02 +0000 http://wordpress.org/?v=2.9 hourly 1 By: Evan Reeves http://tenderlovemaking.com/2009/04/23/namespaces-in-xml/comment-page-1/#comment-110639 Evan Reeves Wed, 24 Feb 2010 18:54:43 +0000 http://tenderlovemaking.com/?p=237#comment-110639 I feel like an idiot for not having discovered this explanation earlier (here or anywhere else!). Thanks for this explanation and special thanks for giving Nokogiri examples. My Ruby n00b ass has a much better understanding now! I feel like an idiot for not having discovered this explanation earlier (here or anywhere else!). Thanks for this explanation and special thanks for giving Nokogiri examples. My Ruby n00b ass has a much better understanding now!

]]> By: Aaron Patterson http://tenderlovemaking.com/2009/04/23/namespaces-in-xml/comment-page-1/#comment-103647 Aaron Patterson Tue, 17 Nov 2009 18:45:02 +0000 http://tenderlovemaking.com/?p=237#comment-103647 @john yes, good catch. I will fix. Thanks! @john yes, good catch. I will fix. Thanks!

]]> By: john http://tenderlovemaking.com/2009/04/23/namespaces-in-xml/comment-page-1/#comment-103646 john Tue, 17 Nov 2009 18:37:13 +0000 http://tenderlovemaking.com/?p=237#comment-103646 Um, should this be doc.xpath, etc.? doc.xml('//tire') doc.xml('//aliceAuto:tire', 'aliceAuto' => 'http://alicesautosupply.example.com/' ) Um, should this be doc.xpath, etc.?

doc.xml(‘//tire’)
doc.xml(‘//aliceAuto:tire’,
‘aliceAuto’ => ‘http://alicesautosupply.example.com/’
)

]]> By: Jeff Smick http://tenderlovemaking.com/2009/04/23/namespaces-in-xml/comment-page-1/#comment-77052 Jeff Smick Sun, 17 May 2009 19:16:44 +0000 http://tenderlovemaking.com/?p=237#comment-77052 <p>How would I find the inventory node for a specific namespace?</p> <p>If we put the two together: </p> <p>What query would I use to find Bob's inventory?</p> How would I find the inventory node for a specific namespace?

If we put the two together:

What query would I use to find Bob’s inventory?

]]> By: Bruce http://tenderlovemaking.com/2009/04/23/namespaces-in-xml/comment-page-1/#comment-75941 Bruce Thu, 07 May 2009 01:38:53 +0000 http://tenderlovemaking.com/?p=237#comment-75941 <p>Maybe a dumb question, but do you have to declare the bindings on every xpath method call, or can you register them independently (which can be useful, particularly if you're dealing with a lot of content with default namespaces)?</p> Maybe a dumb question, but do you have to declare the bindings on every xpath method call, or can you register them independently (which can be useful, particularly if you’re dealing with a lot of content with default namespaces)?

]]> By: Aaron Patterson http://tenderlovemaking.com/2009/04/23/namespaces-in-xml/comment-page-1/#comment-74520 Aaron Patterson Fri, 24 Apr 2009 01:27:36 +0000 http://tenderlovemaking.com/?p=237#comment-74520 <p>@Dr Nic: You could, but then you would have to standardize on an attribute name. Everyone would have to agree on one particular attribute name to examine. If you gave me your XML document, you would have to tell me to examine the "type" attribute, where someone else might choose the "class" attribute. The namespace attribute is standardized.</p> <p>Not to mention in your example, the attribute value would have to be unique. I couldn't tell the difference between a car tire from Ford and a car tire from GM. ;-)</p> @Dr Nic: You could, but then you would have to standardize on an attribute name. Everyone would have to agree on one particular attribute name to examine. If you gave me your XML document, you would have to tell me to examine the “type” attribute, where someone else might choose the “class” attribute. The namespace attribute is standardized.

Not to mention in your example, the attribute value would have to be unique. I couldn’t tell the difference between a car tire from Ford and a car tire from GM. ;-)

]]> By: Dr Nic http://tenderlovemaking.com/2009/04/23/namespaces-in-xml/comment-page-1/#comment-74503 Dr Nic Fri, 24 Apr 2009 00:17:45 +0000 http://tenderlovemaking.com/?p=237#comment-74503 <pre><tire type='car'>...</tire></pre> <tire type='car'>...</tire> ]]> By: Dr Nic http://tenderlovemaking.com/2009/04/23/namespaces-in-xml/comment-page-1/#comment-74499 Dr Nic Thu, 23 Apr 2009 23:54:42 +0000 http://tenderlovemaking.com/?p=237#comment-74499 <p>So why namespacing vs element attributes?</p> <p>e.g. </p> <pre>...</pre> So why namespacing vs element attributes?

e.g. 

...
]]> By: Aaron Patterson http://tenderlovemaking.com/2009/04/23/namespaces-in-xml/comment-page-1/#comment-74487 Aaron Patterson Thu, 23 Apr 2009 21:55:53 +0000 http://tenderlovemaking.com/?p=237#comment-74487 <p>@Dr Nic: Just to make them unique. You could make your URL point somewhere useful, but the main point is to be unique.</p> @Dr Nic: Just to make them unique. You could make your URL point somewhere useful, but the main point is to be unique.

]]> By: Aaron Patterson http://tenderlovemaking.com/2009/04/23/namespaces-in-xml/comment-page-1/#comment-74486 Aaron Patterson Thu, 23 Apr 2009 21:52:17 +0000 http://tenderlovemaking.com/?p=237#comment-74486 <p>@Dr Nic: to avoid name collisions. Imagine if the two companies in my story were to merge XML documents. You would still want to be able to tell the difference between car tires and bike tires. It wouldn't be possible without either changing the tag name, or adding a namespace.</p> <p>I like to think of the namespace as a standardized attribute that is on every node.</p> @Dr Nic: to avoid name collisions. Imagine if the two companies in my story were to merge XML documents. You would still want to be able to tell the difference between car tires and bike tires. It wouldn’t be possible without either changing the tag name, or adding a namespace.

I like to think of the namespace as a standardized attribute that is on every node.

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