If you try to parse Element Centric XML in DOM, you will have to Jump through More "EMPTY NODES"
VS NO Empty Text Node in Attribute Centric XML
EMPTY NODES = "\n" (which creates more looping)
<user username="barneyb"> (Calling NodeList.item(0).getChildNodes() = 5-6 Items depending on "\n")
CFMX takes care of the Internal XML Parsing to Arrays/Structs... so you generally dont see whats involved.
<user username="barneyb" name="Barney Boisvert" password="myPass" />
Here there is NO Nesting and NO Empty Nodes/Text Nodes (NodeNamedMap nnm = Node.getAttributes() )
Havent timed any performance though on Attribute Vs Element (Centric XML)
Joe Eugene
----- Original Message -----
From: Barney Boisvert
To: CF-Talk
Sent: Monday, October 13, 2003 4:51 PM
Subject: RE: Good way to search XML
I honestly don't know, but I doubt the difference is worth worrying about.
Element heavy XML is easier to read and maintain, in my opinon, so I
primarily go that route. Make it work first, and then if it's unacceptably
slow, you can deal with it then. Don't bother spending time on it now
unless you know you're going to have to make it faster (which probably means
a proper database anyway).
-----Original Message-----
From: Joe Eugene [mailto:[EMAIL PROTECTED]
Sent: Monday, October 13, 2003 1:46 PM
To: CF-Talk
Subject: Re: Good way to search XML
<user-list>
<user username="barneyb" name="Barney Boisvert" password="myPass" />
<user username="barneyb1" name="Barney Boisvert 1" password="myPass 1"
/>
<user-list>
Is the above (Attribute Centric XML) slower to search using XPATH than
Element Centric ?
Joe Eugene
----- Original Message -----
From: Barney Boisvert
To: CF-Talk
Sent: Monday, October 13, 2003 1:59 PM
Subject: RE: Good way to search XML
It depends on your XML file format. If you want the ability to search
rapidly based on username, then structure your XML like this:
<user-list>
<user username="barneyb">
<name>Barney Boisvert</name>
<password>myPass</password>
</username>
<user-list>
Having the username as an attribute to the USER tag will allow you to
pull
just that node out with your XPath _expression_. You can obviusly add
multple
attributes to the tag. If you want to search that same snip by name,
you
have to use XPath to get the entire user list in a CF array, and then
loop
the array and search. Not nearly as effecient. This is similar in
concept
to how indexes work in a database. Like the database, there is a cost
to
having lots of attributes, though it's readability in this case, rather
than
insert/update/delete speed.
barneyb
-----Original Message-----
From: Rich Z [mailto:[EMAIL PROTECTED]
Sent: Monday, October 13, 2003 10:43 AM
To: CF-Talk
Subject: Good way to search XML
What's the most efficient way to search through an XML to check -
let's
say - a user name & password kept in an XML file of all users? I
haven't
dug into this yet - but I'm going to try pulling the XML and then
Xpath?
Any other approaches?
-Rich
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