Xerces and Eclipse Disagree : no declaration found for element - xml-validation

Question

I have an XSD and an XML file. Eclipse (version 4.7.3) validates these files with no errors or warnings (and, yes, Eclipse is validating the XML against the XSD). However, when I hand the XSD and the XML files to Xerces (with my XercesDOMParser validation set to Always), I get this error:
no declaration found for element 'g:tssConnections'
I have searched all over, and I cannot seem to find anything that is relevant. Can anyone tell me my error? Here is the XSD:
<?xml version="1.0" encoding="UTF-8" ?>
<xs:schema
xmlns:xs="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://gecoinc.com"
xmlns:geco="http://gecoinc.com"
elementFormDefault="qualified"
attributeFormDefault="qualified">
<xs:simpleType name="ipAddrType">
<xs:annotation>
<xs:documentation>
This type is used to create tags that contain a single
IPv4 address. This type may used for both multicast
and unicast addresses.
</xs:documentation>
</xs:annotation>
<xs:restriction base="xs:string">
<xs:pattern value="([0-9]*\.){3}[0-9]*"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="ipPortType">
<xs:annotation>
<xs:documentation>
This type is used to create tags that contain TCP or UDP port
numbers.
</xs:documentation>
</xs:annotation>
<xs:restriction base="xs:unsignedShort">
<xs:minInclusive value="1"/>
<xs:maxInclusive value="65535"/>
</xs:restriction>
</xs:simpleType>
<xs:complexType name="serverType">
<xs:annotation>
<xs:documentation>
This type is used to create variables that hold information
needed to create a server endpoint.
</xs:documentation>
</xs:annotation>
<xs:all>
<xs:element name="remotePeerPort" type="geco:ipPortType" />
</xs:all>
</xs:complexType>
<xs:complexType name="clientType">
<xs:annotation>
<xs:documentation>
This type is used to create variables that hold information
needed to create a client endpoint.
</xs:documentation>
</xs:annotation>
<xs:all>
<xs:element name="remotePeerIp" type="geco:ipAddrType" />
<xs:element name="remotePeerPort" type="geco:ipPortType" />
</xs:all>
</xs:complexType>
<xs:complexType name="endpointType">
<xs:annotation>
<xs:documentation>
This type is used to create variables that hold information
needed to create an endpoint. Either a client or a server may
be created.
</xs:documentation>
</xs:annotation>
<xs:choice>
<xs:element name="serverParams" type="geco:serverType"/>
<xs:element name="clientParams" type="geco:clientType"/>
</xs:choice>
</xs:complexType>
<xs:simpleType name="transportType">
<xs:restriction base="xs:string">
<xs:enumeration value="tcp"/>
<xs:enumeration value="udp"/>
</xs:restriction>
</xs:simpleType>
<xs:complexType name="connectionType">
<xs:annotation>
<xs:documentation>
This type is used to create structures that hold all of the
information that is needed for a single connection
</xs:documentation>
</xs:annotation>
<xs:all>
<xs:element name="isServer" type="xs:boolean"/>
<xs:element name="endpointParams" type="geco:endpointType"/>
<xs:element name="connectionName" type="xs:string"/>
<xs:element name="transport" type="geco:transportType"/>
<xs:element
name="multicastIntfAddr"
type="geco:ipAddrType"
minOccurs="0"
maxOccurs="1"/>
</xs:all>
</xs:complexType>
<xs:complexType name="connectionListType">
<xs:annotation>
<xs:documentation>
This type is used to create a list of connections.
</xs:documentation>
</xs:annotation>
<xs:sequence>
<xs:element
name="connection"
type="geco:connectionType"
minOccurs="1"
maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
<xs:element name="tssConnections" type="geco:connectionListType" />
</xs:schema>
And here is my XML:
<?xml version="1.0" encoding="UTF-8"?>
<g:tssConnections
xmlns:g="http://gecoinc.com"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://gecoinc.com oss.xsd">
<g:connection>
<g:connectionName>CM_LOAD_PRESET_OUT</g:connectionName>
<g:isServer>false</g:isServer>
<g:endpointParams>
<g:clientParams>
<g:remotePeerIp>224.5.5.5</g:remotePeerIp>
<g:remotePeerPort>11101</g:remotePeerPort>
</g:clientParams>
</g:endpointParams>
<g:transport>udp</g:transport>
<g:multicastIntfAddr>10.0.2.15</g:multicastIntfAddr>
</g:connection>
</g:tssConnections>
Thanks very much in advance!

Answer 1

I found the answer to this problem. It turns out that the error message coming out of Xerces was very misleading. I had to turn on several aspects of validation in the parser, as follows:
domParser->setDoNamespaces( true );
domParser->setDoSchema( true );
domParser->setHandleMultipleImports ( true );
domParser->setValidationSchemaFullChecking( true );
Once I did that, the error went away. I hope that the above can help someone.