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DTD – OIDs und Referenzen

< family > < person id =“jane” mother =“mary” father =“john”> < name > Jane Doe </ name> </ person > < person id =“john” children =“jane jack”> < name > John Doe </ name > </ person >

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DTD – OIDs und Referenzen

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  1. <family> <person id=“jane” mother=“mary” father=“john”> <name> Jane Doe </name></person> <person id=“john” children=“jane jack”> <name> John Doe </name> </person> <person id=“mary” children=“jane jack”> <name> Mary Smith </name> </person> <person id=“jack” mother=“mary” father=“john”> <name> Jack Smith </name></person> </family> <!DOCTYPE family [ <!ELEMENT family (person*)> <!ELEMENT person (name)> <!ELEMENT name (#PCDATA)> <!ATTLIST personid ID #REQUIREDmother IDREF #IMPLIEDfather IDREF #IMPLIEDchildren IDREFS #IMPLIED> ]> DTD XML DTD – OIDs und Referenzen • DTDs erlauben die Deklaration von OIDs, Referenzen und Referenzmengen als Attribute • Beispiel:

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