XML DTD for ISO 23950 posted by Nick Hibma on ftp://mda02.jrc.it/incoming/iso-23950-new.dtd.1

<!-- ISO 23950 XER -->
<!-- XML DTD for ISO 23950 posted by Nick Hibma on ftp://mda02.jrc.it/incoming/iso-23950-new.dtd.1 -->

<!-- The ISO 23950 namespace is the specification in ASN.1
     maintained at "http://lcweb.loc.gov/z3950/agency/asn1.html" -->

<!ELEMENT Search (
    initRequest |
    initResponse |
    searchRequest |
    searchResponse |
    presentRequest |
    presentResponse |
    resourceControlRequest |
    resourceControlResponse |
    scanRequest |
    scanResponse |
    sortRequest |
    sortResponse |
    extendedServicesRequest |
    extendedServicesResponse |
    close |
    )>

<!-- Initialization service definitions -->
<!ELEMENT initRequest (
    referenceId?,
    protocolVersion,
    options,
    preferredMessageSize,
    exceptionalRecordSize,
    idAuthentication?,
    implementationId?,
    implementationName?,
    implementationVersion?,
    userInformationField?,
    otherInfo?
    )>
<!ELEMENT initResponse (
    referenceId?,
    protocolVersion,
    options,
    preferredMessageSize,
    exceptionalRecordSize,
    result,
    implementationId?,
    implementationName?,
    implementationVersion?,
    userInformationField?,
    otherInfo?
    )>

<!-- Search service definitions -->
<!ELEMENT searchRequest (
    referenceId?,
    smallSetUpperBound,
    largeSetLowerBound,
    mediumSetPresentNumber,
    replaceIndicator,
    resultSetName,
    databaseNames,
    smallSetElementSetNames?,
    mediumSetElementSetNames?,
    preferredRecordSyntax?,
    query,
    additionalSearchInfo?,
    otherInfo?
    )>
<!ELEMENT searchResponse (
    referenceId?,
    resultCount,
    numberOfRecordsReturned,
    nextResultSetPosition,
    searchStatus,
    resultSetStatus?,
    presentStatus?,
    records?,
    additionalSearchInfo?,
    otherInfo?
    )>

<!-- Present service definitions -->
<!ELEMENT presentRequest (
    referenceId?,
    resultSetId,
    resultSetStartPoint,
    numberOfRecordsRequested,
    recordComposition?,
    preferredRecordSyntax?,
    otherInfo?
    )>
<!ELEMENT presentResponse (
    referenceId?,
    numberOfRecordsReturned,
    nextResultSetPosition,
    presentStatus,
    records?,
    otherInfo?
    )>

<!-- Resource control service definition -->
<!ELEMENT resourceControlRequest (
    referenceId?,
    suspendedFlag?,
    resourceReport?,
    partialResultsAvailable?,
    responseRequired,
    triggeredRequestFlag?,
    otherInfo?
    )>
<!ELEMENT resourceControlResponse (
    referenceId?,
    continueFlag,
    resultSetWanted?,
    otherInfo?
    )>

<!-- Close service definition -->
<!ELEMENT close (
    referenceId?,
    closeReason,
    diagnosticInformation?,
    resourceReportFormat?,
    resourceReport?,
    otherInfo?
    )>

<!-- Scan service definition -->
<!ELEMENT scanRequest (
    referenceId?,
    databaseNames,
    attributeSet?,
    termListAndStartPoint,
    stepSize?,
    numberOfTermsRequested,
    preferredPositionInResponse?,
    otherInfo?
    )>
<!ELEMENT scanResponse (
    referenceId?,
    stepSize?,
    scanStatus,
    numberOfEntriesReturned,
    positionOfTerm?,
    entries?,
    attributeSet?,
    otherInfo?
    )>

<!-- Sort service definition -->
<!ELEMENT sortRequest (
    referenceId?,
    inputResultSetNames,
    sortedResultSetName,
    sortSequence,
    otherInfo?
    )>
<!ELEMENT sortResponse (
    referenceId?,
    sortStatus,
    resultSetStatus?,
    diagnostics?,
    otherInfo?
    )>

<!-- extendedServices service definition -->
<!ELEMENT extendedServicesRequest (
    referenceId?,
    function,
    packageType,
    packageName?,
    userId?,
    retentionTime?,
    permissions?,
    description?,
    taskSpecificParameters?,
    waitAction,
    elements?,
    otherInfo?
    )>

<!ELEMENT extendedServicesResponse (
    referenceId?,
    operationStatus,
    diagnostics?,
    taskPackage?,
    otherInfo?
    )>


<!-- Auxiliary initialization service definitions -->
<!ELEMENT protocolVersion (#PCDATA)> <!-- values: version-1 version-2 version-3 -->
<!ELEMENT options (#PCDATA)>         <!-- values: search present delSet
                                          triggerResourceCtrl resourceCtrl accessCtrl
                                          scan sort extendedServices level-1Segmentation
                                          level-2Segmentation concurrentOperations
                                          namedResultSets -->
<!ELEMENT preferredMessageSize (#PCDATA)>   <!-- integer -->
<!ELEMENT exceptionalRecordSize (#PCDATA)>  <!-- integer -->
<!ELEMENT result (#PCDATA)>                 <!-- values: true | false -->
<!ELEMENT implementationId (#PCDATA)>       <!-- general string -->
<!ELEMENT implementationName (#PCDATA)>     <!-- general string -->
<!ELEMENT implementationVersion (#PCDATA)>  <!-- general string -->
<!ELEMENT userInformationField (External)>

<!-- Auxiliary search service definitions -->
<!ELEMENT smallSetUpperBound (#PCDATA)>     <!-- integer -->
<!ELEMENT largeSetLowerBound (#PCDATA)>     <!-- integer -->
<!ELEMENT mediumSetPresentNumber (#PCDATA)> <!-- integer -->
<!ELEMENT replaceIndicator (#PCDATA)>       <!-- values: true | false -->
<!ELEMENT resultSetName (#PCDATA)>          <!-- general string -->
<!ELEMENT smallSetElementSetNames (genericElementSetName | databaseSpecific)>
<!ELEMENT mediumSetElementSetNames (genericElementSetName | databaseSpecific)>
<!ELEMENT preferredRecordSyntax (#PCDATA)>  <!-- object identifier -->
<!ELEMENT additionalSearchInfo (#PCDATA)>   <!-- subelement omitted (OtherInformation) -->
<!ELEMENT resultCount (#PCDATA)>            <!-- integer -->
<!ELEMENT searchStatus (#PCDATA)>           <!-- values: true | false -->

<!-- Query definition -->
<!ELEMENT query (type-0 | type-1 | type-2 | type-100 | type-101 | type-102)>
<!ELEMENT type-0 (#PCDATA)>                 <!-- any -->
<!ELEMENT type-1 (attributeSet, rpn)>       <!-- reverse-polish notation query -->
<!ELEMENT type-2 (#PCDATA)>                 <!-- octet string -->
<!ELEMENT type-100 (#PCDATA)>               <!-- octet string -->
<!ELEMENT type-101 (attributeSet, rpn)>     <!-- reverse-polish notation query -->
<!ELEMENT type-102 (#PCDATA)>               <!-- octet string -->

<!-- Query operand definitions -->
<!ELEMENT rpn (op | rpnRpnOp)>              <!-- op is Operator -->
<!ELEMENT rpn1 (op | rpnRpnOp)>             <!-- op is Operator -->
<!ELEMENT rpn2 (op | rpnRpnOp)>             <!-- op is Operator -->
<!ELEMENT rpnRpnOp (rpn1,
                    rpn2,
                    op)>                    <!-- op is Operand -->
<!ELEMENT op (
    (attrTerm | resultSet | resultAttr ) |
    (and | or | and-not)
    )>                                      <!-- op is Operand & Operator -->
<!ELEMENT attrTerm (attributes, term)>      <!-- AttributesPlusTerm -->
<!ELEMENT resultSet (#PCDATA)>              <!-- general string -->
<!ELEMENT resultAttr (#PCDATA)>             <!-- subelements omitted -->
<!ELEMENT numeric (#PCDATA)>                <!-- integer -->
<!ELEMENT string (#PCDATA)>                 <!-- general string -->
<!ELEMENT general (#PCDATA)>                <!-- octet string -->
<!ELEMENT complex (#PCDATA)>                <!-- subelements omitted -->

<!-- Query operator definitions -->
<!ELEMENT and EMPTY>                        <!-- null -->
<!ELEMENT or EMPTY>                         <!-- null -->
<!ELEMENT and-not EMPTY>                    <!-- null -->

<!-- Auxiliary present service definitions -->
<!ELEMENT resultSetStartPoint (#PCDATA)>        <!-- integer -->
<!ELEMENT numberOfRecordsRequested (#PCDATA)>   <!-- integer -->
<!ELEMENT recordComposition (simple)>           <!-- complex omitted -->
<!ELEMENT simple (genericElementSetName | databaseSpecific)>

<!-- Auxiliary search and present service definitions -->
<!ELEMENT numberOfRecordsReturned (#PCDATA)>    <!-- integer -->
<!ELEMENT nextResultSetPosition (#PCDATA)>      <!-- integer -->
<!ELEMENT presentStatus (#PCDATA)>              <!-- values: success | partial-1 |
                                                     partial-2 | partial-3 | partial-4 |
                                                     failure -->

<!-- Record and diagnostic definitions -->
<!ELEMENT records (responseRecords | nonSurrogateDiagnostic | mutipleNonSurDiagnostics)>
<!ELEMENT responseRecords (Item*)>          <!-- sequence of NamePlusRecord -->
<!ELEMENT name (#PCDATA)>                   <!-- general string -->
<!ELEMENT record (retrievalRecord | surrogateDiagnostic)>
<!ELEMENT retrievalRecord (External)>
<!ELEMENT surrogateDiagnostic (defaultFormat | externallyDefined)>

<!-- Auxiliary resource control definitions -->
<!ELEMENT suspendedFlag (#PCDATA)>           <!-- values: true | false -->
<!ELEMENT partialResultsAvailable (#PCDATA)> <!-- values: subset | interim | none -->
<!ELEMENT responseRequired (#PCDATA)>        <!-- values: true | false -->
<!ELEMENT triggeredRequestFlag (#PCDATA)>    <!-- values: true | false -->
<!ELEMENT continueFlag (#PCDATA)>            <!-- values: true | false -->
<!ELEMENT resultSetWanted (#PCDATA)>         <!-- values: true | false -->

<!-- Auxiliary close service definitions -->
<!ELEMENT closeReason (#PCDATA)>            <!-- values: finished | shutdown |
                                                 systemProblem |  costLimit |
                                                 resources | securityViolation |
                                                 protocolError | lackOfActivity |
                                                 peerAbort | unspecified -->
<!ELEMENT diagnosticInformation (#PCDATA)>  <!-- general string -->
<!ELEMENT resourceReportFormat (#PCDATA)>   <!-- object identifier -->

<!-- Auxiliary scan definitions -->
<!ELEMENT termListAndStartPoint (attributes, term)>
<!ELEMENT stepSize (#PCDATA)>                     <!-- integer -->
<!ELEMENT numberOfTermsRequested (#PCDATA)>       <!-- integer -->
<!ELEMENT preferredPositionInResponse (#PCDATA)>  <!-- integer -->
<!ELEMENT entries (
    (entries?, nonsurrogateDiagnostics?) |
    (Item*)
    )>                                      <!-- entries is ListEntries & seq of Entry -->
<!ELEMENT nonsurrogateDiagnostics (Item*)>  <!-- sequence of DiagRec -->
<!ELEMENT termInfo (
    term,
    displayTerm?,
    suggestedAttributes?,
    alternativeTerm?,
    globalOccurrences?,
    byAttributes?,
    otherTermInfo?
    )>
<!ELEMENT displayTerm (#PCDATA)>            <!-- general string -->
<!ELEMENT suggestedAttributes (Item*)>      <!-- sequence of AttributeElement -->
<!ELEMENT alternativeTerm (Item*)>          <!-- sequence of AttributesPlusTerm -->
<!ELEMENT globalOccurrences (#PCDATA)>      <!-- integer -->
<!ELEMENT byAttributes (#PCDATA)>           <!-- definition of OccurrenceByAttributes omitted -->
<!ELEMENT otherTermInfo (#PCDATA)>          <!-- definition of OtherInformation omitted -->
<!ELEMENT numberOfEntriesReturned (#PCDATA)>    <!-- integer -->
<!ELEMENT positionOfTerm (#PCDATA)>         <!-- integer -->
<!ELEMENT scanStatus (#PCDATA)>             <!-- values: success | partial-1 |
                                                 partial-2 | partial-3 | partial-4 |
                                                 partial-5 | failure -->
<!-- Auxiliary sort definitions -->
<!ELEMENT inputResultSetNames (Item*)>      <!-- sequence of general string -->
<!ELEMENT sortedResultSetName (#PCDATA)>    <!-- general string -->
<!ELEMENT sortSequence (Item*)>             <!-- sequence of SortRequest.sortSequence -->
<!ELEMENT sortElement (generic | databaseSpecific)>
<!ELEMENT sortRelation (#PCDATA)>           <!-- values: ascending | descending
                                                 ascendingByFrequency | descendingByFrequency -->
<!ELEMENT caseSensitivity (#PCDATA)>        <!-- values: caseSensitive | caseInsensitive -->
<!ELEMENT missingValueAction ((abort | null), missingValueData)>
<!ELEMENT abort EMPTY>                      <!-- null -->
<!ELEMENT null EMPTY>                       <!-- null -->
<!ELEMENT missingValueData (#PCDATA)>       <!-- octet string -->
<!ELEMENT dbSort (sortField | elementSpec | sortAttributes)>
<!ELEMENT sortField (#PCDATA)>              <!-- general string -->
<!ELEMENT elementSpec (
    (schema?, elementSpec?) |
    (elementSetName | externalSpec)
    )>                                      <!-- used in SortKey & Specification -->
<!ELEMENT schema (#PCDATA)>                 <!-- object identifier -->
<!ELEMENT elementSetName (#PCDATA)>         <!-- general string -->
<!ELEMENT externalSpec (External)>
<!ELEMENT sortAttributes (id, list)>
<!ELEMENT id (#PCDATA)>                     <!-- object identifier -->
<!ELEMENT list (Item*)>                     <!-- sequence of AttributeElement -->
<!ELEMENT sortStatus (#PCDATA)>             <!-- values: success | partial-1 | failure -->


<!-- Auxiliary extendedServices definitions -->
<!ELEMENT function (#PCDATA)>               <!-- values: create | delete | modify -->
<!ELEMENT packageType (#PCDATA)>            <!-- object identifier -->
<!ELEMENT packageName (#PCDATA)>            <!-- general string -->
<!ELEMENT retentionTime (value | unitUsed)>
<!ELEMENT permissions (Item*)>
<!ELEMENT allowableFunctions (Item*)>       <!-- values: delete | modifyContents |
                                                 modifyPermissions | present | invoke -->
<!ELEMENT description (#PCDATA)>
<!ELEMENT taskSpecificParameters (External)>
<!ELEMENT waitAction (#PCDATA)>             <!-- values: wait | waitIfPossible |
                                                   dontWait | dontReturnPackage -->
<!ELEMENT elements (#PCDATA)>               <!-- general string -->
<!ELEMENT operationStatus (#PCDATA)>        <!-- values: done | accepted | failure -->
<!ELEMENT taskPackage (External)>

<!ELEMENT referenceId (#PCDATA)>            <!-- octet string -->
<!ELEMENT resultSetId (#PCDATA)>            <!-- general string -->
<!ELEMENT diagnostics (Item*)>              <!-- sequence of DiagRec -->
<!ELEMENT databaseNames (Item*)>
<!ELEMENT otherInfo (#PCDATA)>              <!-- definition of OtherInformation omitted -->
<!ELEMENT resourceReport (External)>
<!ELEMENT resultSetStatus (#PCDATA)>        <!-- values: empty | subset |
                                                 interim | unchanged | none -->

<!-- Definition of additional components -->

<!-- Authentication (initRequest) -->
<!ELEMENT idAuthentication (open | idPass | anonymous | other)>
<!ELEMENT open (#PCDATA)>                   <!-- visible string -->
<!ELEMENT idPass (groupId?, userId?, password?)>
<!ELEMENT groupId (#PCDATA)>                <!-- general string -->
<!ELEMENT userId (#PCDATA)>                 <!-- general string -->
<!ELEMENT password (#PCDATA)>               <!-- general string -->
<!ELEMENT anonymous EMPTY>                  <!-- null -->
<!ELEMENT other (External)>

<!-- AttributesPlusTerm -->
<!ELEMENT attributes (Item*)>               <!-- sequence of AttributeElement -->
<!ELEMENT term (#PCDATA)>                    <!-- data types for numberic, etc. omitted -->

<!-- AttributeElement -->
<!ELEMENT attributeSet (#PCDATA)>           <!-- object identifier -->
<!ELEMENT attributeType (#PCDATA)>          <!-- integer -->
<!ELEMENT attributeValue (numeric | complex)>

<!-- ElementSetNames -->
<!ELEMENT genericElementSetName (#PCDATA)>  <!-- general string -->
<!ELEMENT databaseSpecific      (Item*)>    <!-- sequence of (dbName, esn) -->
<!ELEMENT dbName                (#PCDATA)>  <!-- general string -->
<!ELEMENT esn                   (#PCDATA)>  <!-- general string -->

<!-- DiagRec -->
<!ELEMENT defaultFormat     (diagnosticSetId | condition | addinfo)>
<!ELEMENT diagnosticSetId   (#PCDATA)>      <!-- object identifier -->
<!ELEMENT condition         (#PCDATA)>      <!-- integer -->
<!ELEMENT addinfo           (v2AddInfo | v3AddInfo)>
<!ELEMENT v2AddInfo         (#PCDATA)>      <!-- visible string -->
<!ELEMENT v3AddInfo         (#PCDATA)>      <!-- general string -->
<!ELEMENT externallyDefined (External)>

<!-- IntUnit -->
<!ELEMENT value (#PCDATA)>                  <!-- integer -->
<!ELEMENT unitUsed (unitSystem | unitType | unit | scalefactor)>
<!ELEMENT unitSystem (#PCDATA)>             <!-- general string -->
<!ELEMENT unitType (string | numeric)>
<!ELEMENT unit (string | numeric)>
<!ELEMENT scaleFactor (#PCDATA)>            <!-- integer -->

<!-- Elements added by the XER specification -->
<!-- the Item tag is used for many things:
AttributesPlusTerm                      (attributes, term)
AttributeList                           (attributeSet?, attributeType, attributeValue)
Records.responseRecords                 (name , record)
DiagRec                                 (defaultFormat | externallyDefined)
Entry                                   (termInfo | surrogateDiagnostic)
SortRequest.sortSequence                (sortElement , sortRelation , caseSensitivity , missingValueAction?)
SortElement.databaseSpecific            (databaseName, dbSort)
ElemenSetnames.databaseSpecific         (dbName , esn)
Permissions                             (userId, allowableFunctions)>
InternationalString                     (#PCDATA)
-->
<!ELEMENT Item (#PCDATA)>

<!-- Global auxiliary definitions -->
<!ELEMENT External (direct-reference, encoding)>
<!ELEMENT direct-reference (#PCDATA)>
<!ELEMENT encoding (single-ASN1-type | octet-aligned)>
<!ELEMENT single-ASN1-type (#PCDATA)>
<!ELEMENT octet-aligned   (#PCDATA)>