I am trying to register the xml schema and getting error

Question

SQL> BEGIN
2 DBMS_XMLSCHEMA.registerSchema(
3 SCHEMAURL => 'http://www.fgdc.gov/metadata/fgdc-std-001-1998.dtd',
4 SCHEMADOC => bfilename('XMLDIR','fgdc-std-001-1998.dtd'),
5 CSID => nls_charset_id('AL32UTF8'));
6 END;
7 /
BEGIN
ERROR at line 1:
ORA-31011: XML parsing failed
ORA-19202: Error occurred in XML processing
LPX-00247: invalid Document Type Declaration (DTD)
Error at line 45
ORA-06512: at "XDB.DBMS_XMLSCHEMA_INT", line 37
ORA-06512: at "XDB.DBMS_XMLSCHEMA", line 61
ORA-06512: at "XDB.DBMS_XMLSCHEMA", line 126
ORA-06512: at line 2
the xml i am trying to register is
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE metadata SYSTEM "http://www.fgdc.gov/metadata/fgdc-std-001-1998.dtd">
<metadata>
<idinfo>
<citation>
<citeinfo>
<origin>MRF</origin>
<pubdate>20040512</pubdate>
<pubtime>09000000</pubtime>
<title>BAS_EASEMENT</title>
etc.
Pls help me in registering the xml schema.

Answer 1

I am registering fgdc-std-001-1998-sect01.xsd, but it is
giving error about citeinfo element.XSD is
<?xml version="1.0" encoding="utf-8"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:sch="http://www.ascc.net/xml/schematron" blockDefault="#all">
<xsd:element name="idinfo" type="idinfoType"/>
<xsd:complexType name="idinfoType">
     <xsd:sequence>
          <xsd:element ref="citation"/>
          <xsd:element ref="descript"/>
          <xsd:element ref="timeperd"/>
          <xsd:element ref="status"/>
          <xsd:element ref="spdom"/>
          <xsd:element ref="keywords"/>
          <xsd:element ref="accconst"/>
          <xsd:element ref="useconst"/>
          <xsd:element ref="ptcontac" minOccurs="0"/>
          <xsd:element ref="browse" minOccurs="0" maxOccurs="unbounded"/>
          <xsd:element ref="datacred" minOccurs="0"/>
          <xsd:element ref="secinfo" minOccurs="0"/>
          <xsd:element ref="native" minOccurs="0"/>
          <xsd:element ref="crossref" minOccurs="0" maxOccurs="unbounded"/>
     </xsd:sequence>
</xsd:complexType>
<xsd:element name="citation" type="citationType"/>
<xsd:complexType name="citationType">
     <xsd:sequence>
          <xsd:element ref="citeinfo"/>
     </xsd:sequence>
</xsd:complexType>
SQL> BEGIN
2 DBMS_XMLSCHEMA.registerSchema(
3 SCHEMAURL => 'fgdc-std-001-1998-sect01.xsd',
4 SCHEMADOC => bfilename('XMLDIR','fgdc-std-001-1998-sect01.xsd'),
5 LOCAL => TRUE,
6 GENTYPES => TRUE,
7 genbean => FALSE,
8 GENTABLES => FALSE,
9 force => False,
10 CSID => nls_charset_id('UTF8'));
11 END;
12 /
BEGIN
ERROR at line 1:
ORA-31154: invalid XML document
ORA-19202: Error occurred in XML processing
LSX-00021: undefined element "citeinfo"
ORA-06512: at "XDB.DBMS_XMLSCHEMA_INT", line 37
ORA-06512: at "XDB.DBMS_XMLSCHEMA", line 61
ORA-06512: at "XDB.DBMS_XMLSCHEMA", line 126
ORA-06512: at line 2
I am unable to understand xsd, is there any manual to understand
xsd or some literature.I need to create new xsd as per requirements
also.But Pl could you help me right now with registering current xsd.