<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE page SYSTEM "pdfdata.dtd">
<page>
        <meta>
                <font family="calibri" size="12" variant="" />
        </meta>
        <header>
                <firstpageonly>
                        <text x="20" y="60">123</text>
                </firstpageonly>
                <common>
                        <text x="20" y="90">456</text>
                </common>
        </header>
        <footer>
                <firstpageonly>
                        <text x="20" y="-20">foo</text>
                        <text x="30" y="-30">bar</text>
                </firstpageonly>
        </footer>
</page>


DTD:
<!ELEMENT page (meta,header,footer)>
<!ELEMENT meta (font)*>
<!ELEMENT font EMPTY>
<!ATTLIST font
 family CDATA #REQUIRED
 size CDATA #REQUIRED
 variant CDATA #REQUIRED
>
<!ELEMENT header (firstpageonly,common)*>
<!ELEMENT footer (firstpageonly,common)*>
<!ELEMENT firstpageonly (text)*>
<!ELEMENT common (text)*>
<!ELEMENT text (CDATA)>
<!ATTLIST text
 x CDATA #REQUIRED
 y CDATA #REQUIRED
>