Extract a certain field from a collection

[Jakob Smith]

Valerio Ricci skrev:
> Hi everyone,
> Recently I was trying to extract the list of ISBN of my collection to add them
> to anobii (honestly I don't think that it is a good way to catalog books, but I
> was interested to book suggestions that the site offers and, privacy apart, I
> decided to have a look at it). The problem is that I couldn't find a way to
> export in a plain text file (or something like that) only ISBN values. Surely I
> can create a template to select only a certain field, but it is not so "user
> friendly". Is there a simpler way to do this operation without "playing" with
> templates?

I don't know if it's simple, but what about exporting the 
collection to an xml-file and writing a script in PHP (or another 
language) which will extract the ISBN values and write them to a 
text-file?

I cant provide you with a finished script. I'm playing around 
with this script:
http://www.tutorialized.com/view/tutorial/How-to-use-XML-with-PHP/10224
and I've had some success extracting information from the 
exported Tellico xml-file. My aim is to integrate one Tellico 
book collection in a PHP-based website and using the XML-file 
seems right now as the way to go.

Regards,

Jakob