<?xml version="1.0" encoding="UTF8"?>
<!--First version of the daffodil metadataquery.
Features: boolsche Anfragen mit Klammerung

sessionid: gives the actually sessionid
maxduration: time in seconds, when the user wants the                 answer
nocache: ask the wrappers (true, false)-->

<!ENTITY % OR "(baseCondition|condition)">
<!ELEMENT metadataquery (%OR;)>
<!ATTLIST metadataquery
  sessionid CDATA #IMPLIED
<!--Seconds how long query should take.-->
  maxduration CDATA #IMPLIED
  nocache (true|false) #IMPLIED
>
<!ELEMENT condition (baseCondition+,connector,condition*)>
<!ELEMENT value (#PCDATA)*>
<!ELEMENT operator EMPTY>
<!ATTLIST operator
  id CDATA #IMPLIED
>
<!ELEMENT attribute EMPTY>
<!ATTLIST attribute
  id CDATA #IMPLIED
>
<!ELEMENT connector EMPTY>
<!ATTLIST connector
  type (required|optional|exclude) "required"
>
<!ELEMENT baseCondition (attribute,value,operator,connector)>