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<!-- ## DTD for WIPO classification datasets ## -->

<!--       This file is: ipctraining.dtd        -->



<!-- records is the root element -->

<!ELEMENT records (record+)>



<!-- a record contains information about a single patent or patent application

     prs:	collection of priority numbers

     ins:	collection of inventors

     pas:	collection of applicants

     ipcs:	collection of IPC codes

     uscs:	collection of US codes

     tis:	collection of titles in several languages

     abs:	collection of abstracts in several languages

     cls:	collection of claims in several languages

     txts:	collection of full-text versions in several languages

 -->

<!ELEMENT record (prs?, ipcs, uscs?, ins, pas, tis, abs?, cls?, txts?)>



<!-- the attributes of a record are:

     cy:	country of origin

     an:	applicant number

     date:	application date

     pn:	publication number

     dnum:	document number

     kind:	publication type

-->

<!ATTLIST record

	cy	   CDATA   	#REQUIRED

	an	   CDATA   	#REQUIRED

	date	   CDATA        #IMPLIED

	pn	   CDATA   	#REQUIRED

	dnum       CDATA   	#REQUIRED

	kind       CDATA   	#REQUIRED

>



<!-- pr:	contains a priority number in a prn attribute -->

<!ELEMENT prs (pr*)>

<!ELEMENT pr EMPTY>

<!ATTLIST pr

	prn	  CDATA    	#REQUIRED

>



<!-- ipcs:	contains the IPC codes

     mc:	main IPC classification

     ed:	version of the IPC used

     ipc:	contains additional IPC codes

     ic:	supplementary IPC codes -->

<!ELEMENT ipcs (ipc*)>

<!ATTLIST ipcs

	ed	CDATA      	#REQUIRED

	mc	CDATA       	#REQUIRED

>

<!ELEMENT ipc EMPTY>

<!ATTLIST ipc

	ic	CDATA      	#REQUIRED

>



<!-- uscs: 	contains the US patent classification codes

     mc:	main US classification

     usc:	additional US codes

     type:	type of additional US code

     uc:	value of additional US code -->

<!ELEMENT uscs (usc+)>

<!ATTLIST uscs

	mc	CDATA      	#REQUIRED

>

<!ELEMENT usc EMPTY>

<!ATTLIST usc

	type	CDATA		#REQUIRED

	uc	CDATA		#REQUIRED

>



<!-- in: contains the name of an inventor -->

<!ELEMENT ins (in+)>

<!ELEMENT in (#PCDATA)>



<!-- pa: contains the name of an applicant company -->

<!ELEMENT pas (pa+)>

<!ELEMENT pa (#PCDATA)>



<!-- ti: contains a title with language indicated in xml:lang attribute -->

<!ELEMENT tis (ti+)>

<!ELEMENT ti (#PCDATA)>

<!ATTLIST ti

	xml:lang	CDATA 	#REQUIRED

>



<!-- ab: contains an abstract with language indicated in xml:lang attribute -->

<!ELEMENT abs (ab+)>

<!ELEMENT ab (#PCDATA)>

<!ATTLIST ab

	xml:lang	CDATA 	#REQUIRED

>



<!-- cl: contains the claims section with language indicated in xml:lang attribute -->

<!ELEMENT cls (cl+)>

<!ELEMENT cl (#PCDATA)>

<!ATTLIST cl

	xml:lang	CDATA 	#REQUIRED

>



<!-- txt: contains the full-text description with language indicated in xml:lang attribute -->

<!ELEMENT txts (txt+)>

<!ELEMENT txt (#PCDATA)>

<!ATTLIST txt

	xml:lang	CDATA 	#REQUIRED

>