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Both sides previous revision Previous revision 2007/06/05 06:35 bojar jen formatovani2007/05/31 14:43 pajas 2007/05/28 16:59 pajas 2007/05/28 00:25 pajas 2007/05/28 00:16 pajas 2007/05/28 00:15 pajas 2007/05/25 01:49 bojar odkaz na pekny clanek se sirsim rozhledem2007/05/16 03:19 bojar odkaz na Honzovu ukazku validace2007/05/03 12:17 bojar 2007/05/03 02:53 bojar 2007/05/03 02:15 bojar 2007/05/02 08:27 stepanek complication with links2007/05/02 04:43 bojar 2007/05/02 04:42 bojar 2007/05/02 04:40 bojar 2007/05/02 04:37 bojar 2007/05/02 04:19 bojar 2007/05/02 04:00 bojar 2007/05/02 03:57 bojar 2007/05/02 03:43 bojar 2007/05/02 03:24 bojar 2007/05/02 03:19 bojar 2007/05/02 03:07 bojar 2007/05/02 02:57 bojar vytvořeno Go Next revision		Previous revision 2007/06/05 06:35 bojar jen formatovani2007/05/31 14:43 pajas 2007/05/28 16:59 pajas 2007/05/28 00:25 pajas 2007/05/28 00:16 pajas 2007/05/28 00:15 pajas 2007/05/25 01:49 bojar odkaz na pekny clanek se sirsim rozhledem2007/05/16 03:19 bojar odkaz na Honzovu ukazku validace2007/05/03 12:17 bojar 2007/05/03 02:53 bojar 2007/05/03 02:15 bojar 2007/05/02 08:27 stepanek complication with links2007/05/02 04:43 bojar 2007/05/02 04:42 bojar 2007/05/02 04:40 bojar 2007/05/02 04:37 bojar 2007/05/02 04:19 bojar 2007/05/02 04:00 bojar 2007/05/02 03:57 bojar 2007/05/02 03:43 bojar 2007/05/02 03:24 bojar 2007/05/02 03:19 bojar 2007/05/02 03:07 bojar 2007/05/02 02:57 bojar vytvořeno Go
pml-haters [2007/05/02 04:43] bojar		pml-haters [2007/06/05 06:35] (current) bojar jen formatovani
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	(Stránku zkusím psát anglicky. Myslím, že by se mohla hodit i mezinárodnímu publiku, jestli s PML prorazíme.)		(Stránku zkusím psát anglicky. Myslím, že by se mohla hodit i mezinárodnímu publiku, jestli s PML prorazíme.)
-	Inspired by [[http://www.simson.net/ref/ugh.pdf|Unix Hater's Handbook]], I am starting this wiki page to collect tips on some basic operations with the not-so-basic PML data format. Please answer any of my unanswered questions and feel free to open new questions.	+	Inspired by [[http://www.simson.net/ref/ugh.pdf|Unix Hater's Handbook]] (please don't feel offended by the title of this page or the book; read the book's preface and anti-foreword), I am starting this wiki page to collect tips on some basic operations with the not-so-basic PML data format. Please answer any of my unanswered questions and feel free to open new questions.
	Links to additional tools are at the bottom of the page.		Links to additional tools are at the bottom of the page.
		+
		+	I strongly recommend [[http://www.jucs.org/jucs_3_9/why_we_need_an/Prechelt_L.pdf|Lutz Prechelt: Why We Need an Explicit Forum for Negative Results]] (esp. section 2.6) for an explanation why not speaking about weaknesses hurts.
	===== In Spite of some Common Assumptions... =====		===== In Spite of some Common Assumptions... =====
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	===== Validation =====		===== Validation =====
-	Given a PML file, how do I validate it? I always forget... Please provide me with the one-liner to do the validation.	+	Given a PML file, how do I validate it?
		+	For most purposes, a libxml2 (DOM) based validator
		+	<code>/f/common/exec/validate_pml --pml-dir /f/common/share/pml --path /f/common/share/tred file_to_validate</code>should work fine and fast.
		+	For huge files, use<code>/f/common/exec/validate_pml_stream --path /f/common/share/tred file_to_validate</code>which is based on Jing (SAX); Jing has no Zlib or stdin support, so some space in /tmp will be needed for temporary files.
		+	Both scripts have decent user documentation. See inside the scripts if interested in the implementation details.
	===== XSH Won't Work: Blame XML Namespaces =====		===== XSH Won't Work: Blame XML Namespaces =====
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	The reason why ''cd tdata'' won't work is a badly specified XML namespace. This works:		The reason why ''cd tdata'' won't work is a badly specified XML namespace. This works:
-	<code>$f/>regns pml http://ufal.mff.cuni.cz/pdt/pml/	+	<code>$f/>regns pml http://ufal.mff.cuni.cz/pdt/pml/;
	$f/>cd pml:tdata		$f/>cd pml:tdata
	$f/pml:tdata>		$f/pml:tdata>
	</code>		</code>
		+
		+	Hint: add the regns command to your ~/.xsh2rc.
	You will have to write the ''pml:'' prefix before every tag name in every XPath!		You will have to write the ''pml:'' prefix before every tag name in every XPath!
-	Most probably you'll still face problems when accessing attributes of XML elements, because namespacing rules apply differently to attributes and elements. I hate XML and will never stop hating it!	+	Most probably you'll still face problems when accessing attributes of XML elements, because namespacing rules apply differently to attributes and elements. You'll need to read XML (Namespaces) specification.
-		+
-		+
-		+
-		+
-		+
-		+
	===== Number of Sentences =====		===== Number of Sentences =====
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	This XPath would quickly give you the number of sentences:		This XPath would quickly give you the number of sentences:
-	<code>count(tdata/trees/LM)	+	<code>count(pml:tdata/pml:trees/pml:LM)
	</code>		</code>
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	<code>cat file.t.xml \		<code>cat file.t.xml \
	| xsh -I - -C "regns pml http://ufal.mff.cuni.cz/pdt/pml/; count(pml:tdata/pml:trees/pml:LM)" 2>/dev/null		| xsh -I - -C "regns pml http://ufal.mff.cuni.cz/pdt/pml/; count(pml:tdata/pml:trees/pml:LM)" 2>/dev/null
		+	</code>
		+
		+	or just the following, if you have the regns command in your ~/.xsh2rc:
		+
		+	<code>cat file.t.xml \
		+	| xsh -I - -C "count(pml:tdata/pml:trees/pml:LM)" 2>/dev/null
	</code>		</code>
Line 87:		Line 94:
	</code>		</code>
		+	Here is a one-liner in Perl that does not load the whole file into memory:
		+
		+	<code>perl -MXML::LibXML::Reader -e 'my $r=XML::LibXML::Reader->new(location=>shift); $r->nextElement("trees"); $d=$r->depth; $r->read; while ($d<$r->depth) {$i++; $r->nextSibling} print $i,"\n"' file.t.xml
		+	</code>
	===== Restricting a Suite of PML Files to Contain only a Specific Sentence =====		===== Restricting a Suite of PML Files to Contain only a Specific Sentence =====
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	Let's assume there is a bug in a script (a bug? impossible!) that handles a suite of files (file-w.xml, file-m.xml, file-a.xml, file-t.xml) containing annotation of some 5000 sentences. I know the bug occurs in sentence 345.		Let's assume there is a bug in a script (a bug? impossible!) that handles a suite of files (file-w.xml, file-m.xml, file-a.xml, file-t.xml) containing annotation of some 5000 sentences. I know the bug occurs in sentence 345.
-	How do I create a suite of files with just the problematic sentence 345, i.e. files test-w.xml, test-m.xml, test-a.xml and test-t.xml, all properly referenced?	+	How do I create a suite of files with just the problematic sentence 345, i.e. files test-w.xml, test-m.xml, test-a.xml and test-t.xml, all properly referenced? A XML-Reader based script by Petr Pajas demonstrates that:
		+	<code>~pajas/projects/pml/tools/separate_t_tree.pl file-t.xml 345
		+	</code>
		+
		+	Creating such a suite is problematic because there can exist links from sentence 345 to previous sentences (from t-layer to a-layer for elided words, within t-layer for coreference). The above mentioned script does not take this issue into account.
	===== Links to Useful Tools =====		===== Links to Useful Tools =====
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	[[http://www.ltg.ed.ac.uk/software/xml/|LT XML]] - tools like sggrep, sgcount, knit... for handling SGML files on command-line, **SAX-based**, i.e. can handle big files		[[http://www.ltg.ed.ac.uk/software/xml/|LT XML]] - tools like sggrep, sgcount, knit... for handling SGML files on command-line, **SAX-based**, i.e. can handle big files
-

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