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Subject: New XML-based techfile cross section
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cdavies
Moderator
Posts: 55
Online: User is Offline
2/21/2008 2:57 PM  
I am looking at parsing the new 16.x XML-based techfile.  One thing I've noticed is that there doesn't seem to be any key that would conveniently indicate the order of the layers in file, other than the natural order they are presented in the file.  Most XML parsers will return the nodes, but there appears to be no way to figure out the order of the layer nodes.

In the old tech files the layers were ordered by an assigned integer (0 = the highest layer, typically the surface layer AIR and each subsequent layer in the stack would be assigned the next available number).  See the numbers in parenthesis ion the example below.

In the new tech files, each layer node is assigned a textual name, for example (old techfile layer index in parenthesis):
SURFACE_2_ABOVE_TOP (0)
DIELECTRIC_ABOVE_TOP (1)
TOP (2)
DIELECTRIC_ABOVE_L2 (3)
L2 (4)
DIELECTRIC_ABOVE_L3 (5)
L3 (6)
DIELECTRIC_MIDDLE (7)
L4 (8)
DIELECTRIC_BELOW_L4 (9)
L5 (10)
DIELECTRIC_BELOW_L5 (11)
BOTTOM (12)
DIELECTRIC_BELOW_BOTTOM (13)
SURFACE_2_BELOW_BOTTOM (14)

We're trying to figure out that after we parse the XML into our program, how do we determine the order of the layers.  There is no index to the nodes. 

Anyone have any ideas?
Charlie Davies
Dave Elder
Moderator
Posts: 150
Online: User is Offline
2/24/2008 1:17 PM  
Hi Charlie,

I too am parsing the XML file (in Skill). I am just using the order that I read the layers in and trusting that it's correct.
Let us know the outcome.

Cheers, Dave
Dave Elder
Tait Electronics
cdavies
Moderator
Posts: 55
Online: User is Offline
2/25/2008 6:26 AM  
Dave,

I am parsing the file in Perl. I was using the XML::Simple package and it did not perserve the node order. It appears as if the Xerces package will preserve the node order. I'll be switching to the XML::Xerces package. I have also asked R&D to add an index identifier in the schema to insure that parsing a bit more straight forward.

I would be intersested in looking at your Skill-based XML parser. Any chance you could share it?

Best Regards,
Charlie
Charlie Davies
Dave Elder
Moderator
Posts: 150
Online: User is Offline
2/25/2008 11:50 AM  
Hi Charlie, My code is less of a parser that a customised extractor. It is customised for my specific requirement (Creating a specification sheet). However, for what it's worth, the code (warts and all) is attached. Cheers, Dave

Attachment: getXMLtechFileData.il
Dave Elder
Tait Electronics
cdavies
Moderator
Posts: 55
Online: User is Offline
2/25/2008 12:47 PM  
Dave,

Thanks. Looks like we could extend this for some other functionality.

Best regards,
Charlie
Charlie Davies
Dave Elder
Moderator
Posts: 150
Online: User is Offline
2/25/2008 12:55 PM  
That's great, Charlie. Feel free to post any enhanced code! Maybe the Skill forum is more appropriate. Cheers, Dave
Dave Elder
Tait Electronics
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