netbeans.apache.org/src/content/dtds/pdf_link-1_0.dtd

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<!--
-//NetBeans//DTD PDF Document Menu Link 1.0//EN
XML file representing the desire to have a link to a PDF document.
May be given as an absolute file, localized path within IDE home, or as a URL.
See: org.netbeans.modules.pdf.LinkProcessor
-->

<!ELEMENT pdfLink (file | idefile | url) >
<!ELEMENT file EMPTY>
<!ATTLIST file
          path CDATA #REQUIRED
>
<!ELEMENT idefile EMPTY>
<!ATTLIST idefile
          base CDATA #REQUIRED
>
<!ELEMENT url EMPTY>
<!ATTLIST url
          name CDATA #REQUIRED
>