- From: Danny Ayers <danny666@virgilio.it>
- Date: Thu, 13 Mar 2003 22:53:05 +0100
- To: <www-rdf-interest@w3.org>
- Message-ID: <BKELLDAGKABIOCHDFDBPMEIBCDAA.danny666@virgilio.it>
Which of the folllowing is the fastest approach to homework? 1. RTFM 2. DSL -----Original Message----- From: www-rdf-interest-request@w3.org [mailto:www-rdf-interest-request@w3.org]On Behalf Of Kalam Abu Sent: 13 March 2003 12:45 To: www-rdf-interest@w3.org Subject: the composite ID attribute Hi,,, The concept of composite key which is available in Relational Database is it also available in the XML DTD or XML RDF? ..I tried to declare an element attributes of a course relation as the following: 1. <!ELEMENT COURSE (course_id, dep_id , title, units)> 2. <!ATTLIST COURSE (course_id, dep_id) ID # REQUIRED> as you can see the two attributes course_id and dep_id of the main Element (relation) COURSE are key (composite key) . my question: Is the syntax of line no.2 right or not and why? Regards -AbuKalam ---------------------------------------------------------------------------- -- Do you Yahoo!? Yahoo! Web Hosting - establish your business online
Received on Thursday, 13 March 2003 16:54:23 UTC