Hi,
we are experimenting with BaseX as a database for a large set of local XML files (3000-4000). When we query for individual elements and attributes in this portfolio of XML documents, is there any way to get location information about concrete elements and attributes. Specifically, we need to know filename, line number and column of element (start tags) and attributes. Is this possible? And if so, how?
Thanks,
Anders
Hi Anders,
extracting the filename is quite easy: `//*/root()/fn:document-uri()` - just change the context node to your needs. `fn:document-uri(root(//*))` works, too.
I'm not totally sure about line numbers and columns, but I do not know any way to retrieve these information. If it is possible, someone else from the core team will veto soon.
Kind regards from Lake Constance, Germany, Jens Erat
"AH" == Anders Hessellund anders.hessellund@gmail.com writes:
AH> elements and attributes. Specifically, we need to know filename, line number and column of element (start tags) and AH> attributes. Is this possible? And if so, how?
Might be related http://lists.gnu.org/archive/html/bug-gnu-emacs/2011-12/msg00319.html
Dear Anders,
I'm sorry: information on the original line and columns gets lost as soon as a database, or a main memory instance of a document, is created. If you look for ways to address the same XML nodes multiple times, you may want to have a look at the fn:path(); it returns an XPath expression to the adressed nodes [1]. A simple example:
for $item in doc('http://files.basex.org/xml/xmark.xml%27)//item return path($item)
If you have create a database from your files, you can also use the BaseX-specific db:node-pre() and db:open-pre() functions to directly address nodes [2].
Hope this helps, Christian
[1] http://www.w3.org/TR/xpath-functions-30/#func-path [2] http://docs.basex.org/wiki/Database_Module ___________________________
On Wed, Jan 11, 2012 at 11:28 PM, Anders Hessellund anders.hessellund@gmail.com wrote:
Hi,
we are experimenting with BaseX as a database for a large set of local XML files (3000-4000). When we query for individual elements and attributes in this portfolio of XML documents, is there any way to get location information about concrete elements and attributes. Specifically, we need to know filename, line number and column of element (start tags) and attributes. Is this possible? And if so, how?
Thanks, Anders
Thanks for your replies,
the line number and column info is pretty important for us. Is there perhaps some part of the parser code that I could hack/fork?
-- Anders
On Thu, Jan 12, 2012 at 11:59 AM, Christian Grün christian.gruen@gmail.comwrote:
Dear Anders,
I'm sorry: information on the original line and columns gets lost as soon as a database, or a main memory instance of a document, is created. If you look for ways to address the same XML nodes multiple times, you may want to have a look at the fn:path(); it returns an XPath expression to the adressed nodes [1]. A simple example:
for $item in doc('http://files.basex.org/xml/xmark.xml%27)//item return path($item)
If you have create a database from your files, you can also use the BaseX-specific db:node-pre() and db:open-pre() functions to directly address nodes [2].
Hope this helps, Christian
[1] http://www.w3.org/TR/xpath-functions-30/#func-path [2] http://docs.basex.org/wiki/Database_Module ___________________________
On Wed, Jan 11, 2012 at 11:28 PM, Anders Hessellund anders.hessellund@gmail.com wrote:
Hi,
we are experimenting with BaseX as a database for a large set of local
XML
files (3000-4000). When we query for individual elements and attributes
in
this portfolio of XML documents, is there any way to get location information about concrete elements and attributes. Specifically, we
need to
know filename, line number and column of element (start tags) and attributes. Is this possible? And if so, how?
Thanks, Anders
Dear Anders,
maybe there's another way to achieve what you want; what do you exactly need line and column information for?
Christian ___________________________
On Sat, Jan 14, 2012 at 12:21 PM, Anders Hessellund anders.hessellund@gmail.com wrote:
Thanks for your replies,
the line number and column info is pretty important for us. Is there perhaps some part of the parser code that I could hack/fork?
-- Anders
On Thu, Jan 12, 2012 at 11:59 AM, Christian Grün christian.gruen@gmail.com wrote:
Dear Anders,
I'm sorry: information on the original line and columns gets lost as soon as a database, or a main memory instance of a document, is created. If you look for ways to address the same XML nodes multiple times, you may want to have a look at the fn:path(); it returns an XPath expression to the adressed nodes [1]. A simple example:
for $item in doc('http://files.basex.org/xml/xmark.xml%27)//item return path($item)
If you have create a database from your files, you can also use the BaseX-specific db:node-pre() and db:open-pre() functions to directly address nodes [2].
Hope this helps, Christian
[1] http://www.w3.org/TR/xpath-functions-30/#func-path [2] http://docs.basex.org/wiki/Database_Module ___________________________
On Wed, Jan 11, 2012 at 11:28 PM, Anders Hessellund anders.hessellund@gmail.com wrote:
Hi,
we are experimenting with BaseX as a database for a large set of local XML files (3000-4000). When we query for individual elements and attributes in this portfolio of XML documents, is there any way to get location information about concrete elements and attributes. Specifically, we need to know filename, line number and column of element (start tags) and attributes. Is this possible? And if so, how?
Thanks, Anders
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