<!ELEMENT sdmetricsmetamodel ( modelelement+ ) >
<!ATTLIST sdmetricsmetamodel
	 version CDATA #REQUIRED>

<!ELEMENT modelelement (#PCDATA|attribute)*>
<!ATTLIST modelelement
	 name CDATA #REQUIRED
	 parent CDATA "sdmetricsbase">

<!ELEMENT attribute (#PCDATA)>
<!ATTLIST attribute
	 name CDATA #REQUIRED
	 type (ref|data) "data"
	 multiplicity (one|many) "one">

