1a input.dtd /^<!ELEMENT a (b)>$/;" e roles:def 2a input.dtd /^<!ATTLIST a$/;" e roles:attOwner extras:reference 3id-attr input.dtd /^ %id-attr;$/;" p element:a roles:partOfAttDef extras:reference 4a/%id-attr input.dtd /^ %id-attr;$/;" p element:a roles:partOfAttDef extras:qualified,reference 5type input.dtd /^ type CDATA "text\/smil-basic-layout"$/;" a element:a roles:def 6a/@type input.dtd /^ type CDATA "text\/smil-basic-layout"$/;" a element:a roles:def extras:qualified 7