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lukecampbell/CSW-discovery.xsd

Created April 24, 2017 19:11
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Troubleshooting lxml
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CSW-discovery.xsd
<?xml version="1.0"?>
<xsd:schema
id="csw-discovery"
targetNamespace="http://www.opengis.net/cat/csw/2.0.2"
xmlns:csw="http://www.opengis.net/cat/csw/2.0.2"
xmlns:ogc="http://www.opengis.net/ogc"
xmlns:ows="http://www.opengis.net/ows"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified"
version="2.0.2 2010-01-22">
<xsd:annotation>
<xsd:appinfo>
<dc:identifier xmlns:dc="http://purl.org/dc/elements/1.1/">http://schemas.opengis.net/csw/2.0.2/CSW-discovery.xsd</dc:identifier>
</xsd:appinfo>
<xsd:documentation xml:lang="en">
This schema defines the request and response messages for the CSW-Discovery operations specified in clause 10 of OGC-07-066.
CSW is an OGC Standard.
Copyright (c) 2004,2010 Open Geospatial Consortium, Inc. All Rights Reserved.
To obtain additional rights of use, visit http://www.opengeospatial.org/legal/ .
</xsd:documentation>
</xsd:annotation>
<xsd:include schemaLocation="record.xsd"/>
<xsd:import namespace="http://www.opengis.net/ows" schemaLocation="../../ows/1.0.0/owsAll.xsd"/>
<xsd:import namespace="http://www.opengis.net/ogc" schemaLocation="../../filter/1.1.0/filter.xsd"/>
<xsd:complexType name="RequestBaseType" id="RequestBaseType" abstract="true">
<xsd:annotation>
<xsd:documentation>
Base type for all request messages except GetCapabilities. The
attributes identify the relevant service type and version.
</xsd:documentation>
</xsd:annotation>
<xsd:attribute name="service" type="ows:ServiceType"
use="required" fixed="CSW"/>
<xsd:attribute name="version" type="ows:VersionType"
use="required" fixed="2.0.2"/>
</xsd:complexType>
<xsd:element name="GetCapabilities" id="GetCapabilities"
type="csw:GetCapabilitiesType"/>
<xsd:complexType name="GetCapabilitiesType" id="GetCapabilitiesType">
<xsd:annotation>
<xsd:documentation>
Request for a description of service capabilities. See OGC 05-008
for more information.
</xsd:documentation>
</xsd:annotation>
<xsd:complexContent>
<xsd:extension base="ows:GetCapabilitiesType">
<xsd:attribute name="service" type="ows:ServiceType" use="optional"
default="http://www.opengis.net/cat/csw"/>
</xsd:extension>
</xsd:complexContent>
</xsd:complexType>
<xsd:element name="Capabilities" id="Capabilities"
type="csw:CapabilitiesType"/>
<xsd:complexType name="CapabilitiesType" id="CapabilitiesType">
<xsd:annotation>
<xsd:documentation>This type extends ows:CapabilitiesBaseType defined in OGC-05-008
to include information about supported OGC filter components. A
profile may extend this type to describe additional capabilities.</xsd:documentation>
</xsd:annotation>
<xsd:complexContent>
<xsd:extension base="ows:CapabilitiesBaseType">
<xsd:sequence>
<xsd:element ref="ogc:Filter_Capabilities"/>
</xsd:sequence>
</xsd:extension>
</xsd:complexContent>
</xsd:complexType>
<xsd:element name="DescribeRecord" type="csw:DescribeRecordType"
id="DescribeRecord"/>
<xsd:complexType name="DescribeRecordType" id="DescribeRecordType">
<xsd:annotation>
<xsd:documentation xml:lang="en">This request allows a user to discover elements of the
information model supported by the catalogue. If no TypeName
elements are included, then all of the schemas for the
information model must be returned.
schemaLanguage - preferred schema language
(W3C XML Schema by default)
outputFormat - preferred output format (application/xml by default)</xsd:documentation>
</xsd:annotation>
<xsd:complexContent>
<xsd:extension base="csw:RequestBaseType">
<xsd:sequence>
<xsd:element name="TypeName" type="xsd:QName" minOccurs="0"
maxOccurs="unbounded"/>
</xsd:sequence>
<xsd:attribute name="outputFormat" type="xsd:string" use="optional"
default="application/xml"/>
<xsd:attribute name="schemaLanguage" type="xsd:anyURI"
use="optional" default="http://www.w3.org/XML/Schema"/>
</xsd:extension>
</xsd:complexContent>
</xsd:complexType>
<xsd:element name="DescribeRecordResponse" id="DescribeRecordResponse"
type="csw:DescribeRecordResponseType"/>
<xsd:complexType name="DescribeRecordResponseType"
id="DescribeRecordResponseType">
<xsd:annotation>
<xsd:documentation xml:lang="en">The response contains a list of matching schema components
in the requested schema language.</xsd:documentation>
</xsd:annotation>
<xsd:sequence>
<xsd:element name="SchemaComponent" type="csw:SchemaComponentType"
minOccurs="0" maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="SchemaComponentType" mixed="true"
id="SchemaComponentType">
<xsd:annotation>
<xsd:documentation xml:lang="en">A schema component includes a schema fragment (type
definition) or an entire schema from some target namespace;
the schema language is identified by URI. If the component
is a schema fragment its parent MUST be referenced (parentSchema).</xsd:documentation>
</xsd:annotation>
<xsd:sequence>
<xsd:any namespace="##any" processContents="lax"/>
</xsd:sequence>
<xsd:attribute name="targetNamespace" type="xsd:anyURI" use="required"/>
<xsd:attribute name="parentSchema" type="xsd:anyURI" use="optional"/>
<xsd:attribute name="schemaLanguage" type="xsd:anyURI" use="required"/>
</xsd:complexType>
<xsd:element name="GetRecords" type="csw:GetRecordsType" id="GetRecords"/>
<xsd:complexType name="GetRecordsType" id="GetRecordsType">
<xsd:annotation>
<xsd:documentation xml:lang="en">
The principal means of searching the catalogue. The matching
catalogue entries may be included with the response. The client
may assign a requestId (absolute URI). A distributed search is
performed if the DistributedSearch element is present and the
catalogue is a member of a federation. Profiles may allow
alternative query expressions.</xsd:documentation>
</xsd:annotation>
<xsd:complexContent>
<xsd:extension base="csw:RequestBaseType">
<xsd:sequence>
<xsd:element name="DistributedSearch"
type="csw:DistributedSearchType" minOccurs="0"/>
<xsd:element name="ResponseHandler" type="xsd:anyURI"
minOccurs="0" maxOccurs="unbounded"/>
<xsd:choice>
<xsd:element ref="csw:AbstractQuery"/>
<xsd:any processContents="strict" namespace="##other"/>
</xsd:choice>
</xsd:sequence>
<xsd:attribute name="requestId" type="xsd:anyURI" use="optional"/>
<xsd:attribute name="resultType" type="csw:ResultType"
use="optional" default="hits"/>
<xsd:attributeGroup ref="csw:BasicRetrievalOptions"/>
</xsd:extension>
</xsd:complexContent>
</xsd:complexType>
<xsd:attributeGroup name="BasicRetrievalOptions" id="BasicRetrievalOptions">
<xsd:annotation>
<xsd:documentation xml:lang="en">Various attributes that specify basic retrieval options:
outputFormat - the media type of the response message
outputSchema - the preferred schema for records in the result set
startPosition - requests a slice of the result set, starting
at this position
maxRecords - the maximum number of records to return. No
records are returned if maxRecords=0.</xsd:documentation>
</xsd:annotation>
<xsd:attribute name="outputFormat" type="xsd:string" use="optional"
default="application/xml"/>
<xsd:attribute name="outputSchema" type="xsd:anyURI" use="optional"/>
<xsd:attribute name="startPosition" type="xsd:positiveInteger"
use="optional" default="1"/>
<xsd:attribute name="maxRecords" type="xsd:nonNegativeInteger"
use="optional" default="10"/>
</xsd:attributeGroup>
<xsd:simpleType name="ResultType" id="ResultType">
<xsd:restriction base="xsd:string">
<xsd:enumeration value="results">
<xsd:annotation>
<xsd:documentation>Include results in the response.</xsd:documentation>
</xsd:annotation>
</xsd:enumeration>
<xsd:enumeration value="hits">
<xsd:annotation>
<xsd:documentation>Provide a result set summary, but no results.</xsd:documentation>
</xsd:annotation>
</xsd:enumeration>
<xsd:enumeration value="validate">
<xsd:annotation>
<xsd:documentation>Validate the request and return an Acknowledgement message if it
is valid. Continue processing the request asynchronously.</xsd:documentation>
</xsd:annotation>
</xsd:enumeration>
</xsd:restriction>
</xsd:simpleType>
<xsd:complexType name="DistributedSearchType" id="DistributedSearchType">
<xsd:annotation>
<xsd:documentation xml:lang="en">Governs the behaviour of a distributed search.
hopCount - the maximum number of message hops before
the search is terminated. Each catalogue node
decrements this value when the request is received,
and must not forward the request if hopCount=0.</xsd:documentation>
</xsd:annotation>
<xsd:attribute name="hopCount" type="xsd:positiveInteger" use="optional"
default="2"/>
</xsd:complexType>
<xsd:element name="AbstractQuery" type="csw:AbstractQueryType"
id="AbstractQuery" abstract="true"/>
<xsd:complexType name="AbstractQueryType" id="AbstractQueryType"
abstract="true"/>
<xsd:element name="Query" type="csw:QueryType" id="Query"
substitutionGroup="csw:AbstractQuery"/>
<xsd:complexType name="QueryType" id="QueryType">
<xsd:annotation>
<xsd:documentation xml:lang="en">Specifies a query to execute against instances of one or
more object types. A set of ElementName elements may be included
to specify an adhoc view of the csw:Record instances in the result
set. Otherwise, use ElementSetName to specify a predefined view.
The Constraint element contains a query filter expressed in a
supported query language. A sorting criterion that specifies a
property to sort by may be included.
typeNames - a list of object types to query.</xsd:documentation>
</xsd:annotation>
<xsd:complexContent>
<xsd:extension base="csw:AbstractQueryType">
<xsd:sequence>
<xsd:choice>
<xsd:element ref="csw:ElementSetName"/>
<xsd:element name="ElementName"
type="xsd:QName"
minOccurs="1" maxOccurs="unbounded"/>
</xsd:choice>
<xsd:element ref="csw:Constraint" minOccurs="0" maxOccurs="1"/>
<xsd:element ref="ogc:SortBy" minOccurs="0" maxOccurs="1"/>
</xsd:sequence>
<xsd:attribute name="typeNames" type="csw:TypeNameListType"
use="required"/>
</xsd:extension>
</xsd:complexContent>
</xsd:complexType>
<xsd:simpleType name="TypeNameListType" id="TypeNameListType">
<xsd:annotation>
<xsd:documentation xml:lang="en">The exact syntax is defined in an application profile. If querying
against the common record properties, only a single type may be
specified (Record).</xsd:documentation>
</xsd:annotation>
<xsd:list itemType="xsd:QName"/>
</xsd:simpleType>
<xsd:element name="Constraint" type="csw:QueryConstraintType" id="Constraint"/>
<xsd:complexType name="QueryConstraintType" id="QueryConstraintType">
<xsd:annotation>
<xsd:documentation xml:lang="en">A search constraint that adheres to one of the following syntaxes:
Filter - OGC filter expression
CqlText - OGC CQL predicate</xsd:documentation>
</xsd:annotation>
<xsd:choice>
<xsd:element ref="ogc:Filter"/>
<xsd:element name="CqlText" type="xsd:string"/>
</xsd:choice>
<xsd:attribute name="version" type="xsd:string" use="required">
<xsd:annotation>
<xsd:documentation>Query language version</xsd:documentation>
</xsd:annotation>
</xsd:attribute>
</xsd:complexType>
<xsd:element name="ElementSetName" type="csw:ElementSetNameType"
id="ElementSetName" default="summary"/>
<xsd:complexType name="ElementSetNameType" id="ElementSetNameType">
<xsd:simpleContent>
<xsd:extension base="csw:ElementSetType">
<xsd:attribute name="typeNames" type="csw:TypeNameListType"
use="optional"/>
</xsd:extension>
</xsd:simpleContent>
</xsd:complexType>
<xsd:simpleType name="ElementSetType" id="ElementSetType">
<xsd:annotation>
<xsd:documentation>Named subsets of catalogue object properties; these
views are mapped to a specific information model and
are defined in an application profile.</xsd:documentation>
</xsd:annotation>
<xsd:restriction base="xsd:string">
<xsd:enumeration value="brief"/>
<xsd:enumeration value="summary"/>
<xsd:enumeration value="full"/>
</xsd:restriction>
</xsd:simpleType>
<xsd:element name="GetRecordsResponse" type="csw:GetRecordsResponseType"
id="GetRecordsResponse"/>
<xsd:complexType name="GetRecordsResponseType">
<xsd:annotation>
<xsd:documentation xml:lang="en">
The response message for a GetRecords request. Some or all of the
matching records may be included as children of the SearchResults
element. The RequestId is only included if the client specified it.
</xsd:documentation>
</xsd:annotation>
<xsd:sequence>
<xsd:element name="RequestId" type="xsd:anyURI" minOccurs="0"/>
<xsd:element name="SearchStatus" type="csw:RequestStatusType"/>
<xsd:element name="SearchResults" type="csw:SearchResultsType"/>
</xsd:sequence>
<xsd:attribute name="version" type="xsd:string" use="optional"/>
</xsd:complexType>
<xsd:complexType name="RequestStatusType" id="RequestStatusType">
<xsd:annotation>
<xsd:documentation>
This element provides information about the status of the
search request.
status - status of the search
timestamp - the date and time when the result set was modified
(ISO 8601 format: YYYY-MM-DDThh:mm:ss[+|-]hh:mm).
</xsd:documentation>
</xsd:annotation>
<xsd:attribute name="timestamp" type="xsd:dateTime" use="optional"/>
</xsd:complexType>
<xsd:complexType name="SearchResultsType" id="SearchResultsType">
<xsd:annotation>
<xsd:documentation>Includes representations of result set members if maxRecords &gt; 0.
The items must conform to one of the csw:Record views or a
profile-specific representation.
resultSetId - id of the result set (a URI).
elementSet - The element set that has been returned
(i.e., "brief", "summary", "full")
recordSchema - schema reference for included records(URI)
numberOfRecordsMatched - number of records matched by the query
numberOfRecordsReturned - number of records returned to client
nextRecord - position of next record in the result set
(0 if no records remain).
expires - the time instant when the result set expires and
is discarded (ISO 8601 format)</xsd:documentation>
</xsd:annotation>
<xsd:sequence>
<xsd:choice>
<xsd:element ref="csw:AbstractRecord"
minOccurs="0" maxOccurs="unbounded"/>
<xsd:any processContents="strict" namespace="##other"
minOccurs="0" maxOccurs="unbounded"/>
</xsd:choice>
</xsd:sequence>
<xsd:attribute name="resultSetId"
type="xsd:anyURI" use="optional"/>
<xsd:attribute name="elementSet"
type="csw:ElementSetType" use="optional"/>
<xsd:attribute name="recordSchema"
type="xsd:anyURI" use="optional"/>
<xsd:attribute name="numberOfRecordsMatched"
type="xsd:nonNegativeInteger" use="required"/>
<xsd:attribute name="numberOfRecordsReturned"
type="xsd:nonNegativeInteger" use="required"/>
<xsd:attribute name="nextRecord"
type="xsd:nonNegativeInteger" use="optional"/>
<xsd:attribute name="expires" type="xsd:dateTime" use="optional"/>
</xsd:complexType>
<xsd:element name="GetRecordById" type="csw:GetRecordByIdType"
id="GetRecordById"/>
<xsd:complexType name="GetRecordByIdType" id="GetRecordByIdType">
<xsd:annotation>
<xsd:documentation xml:lang="en">
Convenience operation to retrieve default record representations
by identifier.
Id - object identifier (a URI) that provides a reference to a
catalogue item (or a result set if the catalogue supports
persistent result sets).
ElementSetName - one of "brief, "summary", or "full"
</xsd:documentation>
</xsd:annotation>
<xsd:complexContent>
<xsd:extension base="csw:RequestBaseType">
<xsd:sequence>
<xsd:element name="Id" type="xsd:anyURI" maxOccurs="unbounded"/>
<xsd:element ref="csw:ElementSetName" minOccurs="0"/>
</xsd:sequence>
<xsd:attribute name="outputFormat" type="xsd:string"
use="optional" default="application/xml"/>
<xsd:attribute name="outputSchema" type="xsd:anyURI"
use="optional"/>
</xsd:extension>
</xsd:complexContent>
</xsd:complexType>
<xsd:element name="GetRecordByIdResponse"
type="csw:GetRecordByIdResponseType" id="GetRecordByIdResponse"/>
<xsd:complexType name="GetRecordByIdResponseType"
id="GetRecordByIdResponseType">
<xsd:annotation>
<xsd:documentation xml:lang="en">Returns a representation of the matching entry. If there is no
matching record, the response message must be empty.</xsd:documentation>
</xsd:annotation>
<xsd:sequence>
<xsd:choice>
<xsd:element ref="csw:AbstractRecord"
minOccurs="0" maxOccurs="unbounded"/>
<xsd:any processContents="strict" namespace="##other"
minOccurs="0" maxOccurs="unbounded"/>
</xsd:choice>
</xsd:sequence>
</xsd:complexType>
<xsd:element name="GetDomain" type="csw:GetDomainType" id="GetDomain"/>
<xsd:complexType name="GetDomainType" id="GetDomainType">
<xsd:annotation>
<xsd:documentation xml:lang="en">Requests the actual values of some specified request parameter
or other data element.</xsd:documentation>
</xsd:annotation>
<xsd:complexContent>
<xsd:extension base="csw:RequestBaseType">
<xsd:sequence>
<xsd:choice>
<xsd:element name="PropertyName" type="xsd:anyURI"/>
<xsd:element name="ParameterName" type="xsd:anyURI"/>
</xsd:choice>
</xsd:sequence>
</xsd:extension>
</xsd:complexContent>
</xsd:complexType>
<xsd:element name="GetDomainResponse" type="csw:GetDomainResponseType"
id="GetDomainResponse"/>
<xsd:complexType name="GetDomainResponseType">
<xsd:annotation>
<xsd:documentation xml:lang="en">Returns the actual values for some property. In general this is a
subset of the value domain (that is, set of permissible values),
although in some cases these may be the same.</xsd:documentation>
</xsd:annotation>
<xsd:sequence>
<xsd:element name="DomainValues" type="csw:DomainValuesType"
maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="DomainValuesType" id="DomainValuesType">
<xsd:sequence>
<xsd:choice>
<xsd:element name="PropertyName" type="xsd:anyURI"/>
<xsd:element name="ParameterName" type="xsd:anyURI"/>
</xsd:choice>
<xsd:choice minOccurs="0">
<xsd:element name="ListOfValues" type="csw:ListOfValuesType"/>
<xsd:element name="ConceptualScheme" type="csw:ConceptualSchemeType"/>
<xsd:element name="RangeOfValues" type="csw:RangeOfValuesType"/>
</xsd:choice>
</xsd:sequence>
<xsd:attribute name="type" type="xsd:QName" use="required"/>
<xsd:attribute name="uom" type="xsd:anyURI" use="optional"/>
</xsd:complexType>
<xsd:complexType name="ListOfValuesType" id="ListOfValuesType">
<xsd:sequence>
<xsd:element name="Value" type="xsd:anyType" maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="ConceptualSchemeType" id="ConceptualSchemeType">
<xsd:sequence>
<xsd:element name="Name" type="xsd:string"/>
<xsd:element name="Document" type="xsd:anyURI"/>
<xsd:element name="Authority" type="xsd:anyURI"/>
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="RangeOfValuesType" id="RangeOfValuesType">
<xsd:sequence>
<xsd:element name="MinValue" type="xsd:anyType"/>
<xsd:element name="MaxValue" type="xsd:anyType"/>
</xsd:sequence>
</xsd:complexType>
<xsd:element name="Acknowledgement" type="csw:AcknowledgementType"
id="Acknowledgement"/>
<xsd:complexType name="AcknowledgementType" id="AcknowledgementType">
<xsd:annotation>
<xsd:documentation xml:lang="en">This is a general acknowledgement response message for all requests
that may be processed in an asynchronous manner.
EchoedRequest - Echoes the submitted request message
RequestId - identifier for polling purposes (if no response
handler is available, or the URL scheme is
unsupported)</xsd:documentation>
</xsd:annotation>
<xsd:sequence>
<xsd:element name="EchoedRequest" type="csw:EchoedRequestType"/>
<xsd:element name="RequestId" type="xsd:anyURI" minOccurs="0"/>
</xsd:sequence>
<xsd:attribute name="timeStamp" type="xsd:dateTime" use="required"/>
</xsd:complexType>
<xsd:complexType name="EchoedRequestType" id="EchoedRequestType">
<xsd:annotation>
<xsd:documentation xml:lang="en">Includes a copy of the request message body.</xsd:documentation>
</xsd:annotation>
<xsd:sequence>
<xsd:any namespace="##any" processContents="lax"/>
</xsd:sequence>
</xsd:complexType>
</xsd:schema>
Raw
error.txt
Traceback (most recent call last):
File "example.py", line 7, in <module>
etree.fromstring(postdoc, parser)
File "lxml.etree.pyx", line 3032, in lxml.etree.fromstring (src/lxml/lxml.etree.c:68121)
File "parser.pxi", line 1786, in lxml.etree._parseMemoryDocument (src/lxml/lxml.etree.c:102470)
File "parser.pxi", line 1674, in lxml.etree._parseDoc (src/lxml/lxml.etree.c:101299)
File "parser.pxi", line 1074, in lxml.etree._BaseParser._parseDoc (src/lxml/lxml.etree.c:96481)
File "parser.pxi", line 582, in lxml.etree._ParserContext._handleParseResultDoc (src/lxml/lxml.etree.c:91290)
File "parser.pxi", line 683, in lxml.etree._handleParseResult (src/lxml/lxml.etree.c:92476)
File "parser.pxi", line 622, in lxml.etree._raiseParseError (src/lxml/lxml.etree.c:91772)
lxml.etree.XMLSyntaxError: Element '{http://www.opengis.net/cat/csw/2.0.2}GetRecords', attribute 'resultType': [facet 'enumeration'] The value '' is not an element of the set {'results', 'hits', 'validate'}.
Raw
postdoc.xml
<?xml version="1.0"?>
<csw:GetRecords xmlns:csw="http://www.opengis.net/cat/csw/2.0.2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" outputSchema="http://www.opengis.net/cat/csw/2.0.2" outputFormat="application/xml" version="2.0.2" service="CSW" resultType="results" maxRecords="20" xsi:schemaLocation="http://www.opengis.net/cat/csw/2.0.2 http://schemas.opengis.net/csw/2.0.2/CSW-discovery.xsd">
<csw:Query typeNames="csw:Record">
<csw:ElementSetName>summary</csw:ElementSetName>
</csw:Query>
</csw:GetRecords>
Raw
test.py
from lxml import etree
schema_path = 'CSW-discovery.xsd'
schema = etree.XMLSchema(file=schema_path)
with open('postdoc.xml', 'r') as f:
postdoc = f.read()
parser = etree.XMLParser(schema=schema, resolve_entities=False)
etree.fromstring(postdoc, parser)
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