6.5 External Resource Identifiers and Notation Declarations

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6.5 External Resource Identifiers and Notation Declarations

SYSTEM "system-id"

PUBLIC "public-id"

PUBLIC "public-id" "system-id"

System and public id’s are URIs
The interpretation of the notation is to be done by the application

SYSTEM "usr/bin/png"
PUBLIC "-//CompuServe//NOTATION Graphics Interchange Format 89a//EN"

<!NOTATION name (external-id) >

Introduces a data type
The interpretation of the notation is to be done by the application

<!NOTATION png SYSTEM "usr/bin/png" >
<!NOTATION gif PUBLIC
  "-//CompuServe//NOTATION Graphics Interchange Format 89a//EN" >
<!ELEMENT pic EMPTY>
<!ATTLIST pic
          ref  CDATA                   #IMPLIED
          type NOTATION  ( png | gif ) #IMPLIED
          obj  ENTITY                  #IMPLIED >

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