xml validation against schema

[eXavier]

Hi,
I need to validate XML fragment against XSD schema. The main issue is that
xml fragment does not contain refrence to schema, but I want to force the
validation against the schema I have in XmlSchema object.

The scenario is as follows:
I have

string fragment;

containing xml fragment, e.g. something like
"<bookstore><bo ok
genre="novel">< title>Abc</title><author>< first-name>A</first-name><last-name

B</last-name></author><price>8 .99</price></book></bookstore>"

but this xml is just fragment of larger xml document received from third
party;
and

XmlSchema schema;

containing loaded XSD of bookstore.

I need code snippet to perform validation of fragment against schema.

Thanks,
eXavier


I played a little with XmlValidatingRe ader, but I am no guru in XSDs and
..NET System.XML namespace, so I don't much understand what namespaces to set

NameTable nt = new NameTable();
XmlNamespaceMan ager nsmgr = new XmlNamespaceMan ager(nt);
nsmgr.AddNamesp ace(String.Empt y, "urn:bookst ore-schema");
XmlParserContex t ctx = new XmlParserContex t(null, nsmgr, null,
XmlSpace.None);
XmlValidatingRe ader r = new XmlValidatingRe ader( xmlTxt,
XmlNodeType.Ele ment, ctx);
r.Schemas.Add( schema);
r.ValidationTyp e = ValidationType. Schema;
r.ValidationEve ntHandler += new ValidationEvent Handler (ValidationCall Back);
while (r.Read()){}
The schema was loaded from this:

<xsd:schema xmlns:xsd="http ://www.w3.org/2001/XMLSchema"
xmlns="urn:book store-schema"
elementFormDefa ult="qualified"
targetNamespace ="urn:bookst ore-schema">

<xsd:element name="bookstore " type="bookstore Type"/>

<xsd:complexTyp e name="bookstore Type">
<xsd:sequence maxOccurs="unbo unded">
<xsd:element name="book" type="bookType"/>
</xsd:sequence>
</xsd:complexType >

<xsd:complexTyp e name="bookType" >
<xsd:sequence >
<xsd:element name="title" type="xsd:strin g"/>
<xsd:element name="author" type="authorNam e"/>
<xsd:element name="price" type="xsd:decim al"/>
</xsd:sequence>
<xsd:attribut e name="genre" type="xsd:strin g"/>
</xsd:complexType >

<xsd:complexTyp e name="authorNam e">
<xsd:sequence >
<xsd:element name="first-name" type="xsd:strin g"/>
<xsd:element name="last-name" type="xsd:strin g"/>
</xsd:sequence>
</xsd:complexType >

</xsd:schema>

[SammySam]

I am not sure if one can validate a fragment against its
superset's schema, it basically turns the purpose of
schema upside down. You can for sure, try to validate the
XML before it fragments. You can definitely use
XMLValidatingRe ader from this link

http://msdn.microsoft.com/library/default.asp?
url=/library/en-
us/cpguide/html/cpconvalidation ofxmlwithxmlval idatingreader
..asp

useful snippets!

-----Original Message-----
Hi,
I need to validate XML fragment against XSD schema. The main issue is thatxml fragment does not contain refrence to schema, but I want to force thevalidation against the schema I have in XmlSchema object.

The scenario is as follows:
I have

string fragment;

containing xml fragment, e.g. something like
"<bookstore><b ook
genre="novel"> <title>Abc</title><author>< first- name>A</first-name><last-name

B</last-

name></author><price>8 .99</price></book></bookstore>"but this xml is just fragment of larger xml document received from thirdparty;
and

XmlSchema schema;

containing loaded XSD of bookstore.

I need code snippet to perform validation of fragment against schema.
Thanks,
eXavier


I played a little with XmlValidatingRe ader, but I am no guru in XSDs and..NET System.XML namespace, so I don't much understand what namespaces to set
NameTable nt = new NameTable();
XmlNamespaceMa nager nsmgr = new XmlNamespaceMan ager(nt);
nsmgr.AddNames pace(String.Emp ty, "urn:bookst ore-schema");
XmlParserConte xt ctx = new XmlParserContex t(null, nsmgr, null,XmlSpace.None) ;
XmlValidatingR eader r = new XmlValidatingRe ader( xmlTxt,
XmlNodeType.El ement, ctx);
r.Schemas.Ad d( schema);
r.ValidationTy pe = ValidationType. Schema;
r.ValidationEv entHandler += new ValidationEvent Handler (ValidationCall Back);while (r.Read()){}
The schema was loaded from this:

<xsd:schema xmlns:xsd="http ://www.w3.org/2001/XMLSchema"
xmlns="urn:book store-schema"
elementFormDefa ult="qualified"
targetNamespace ="urn:bookst ore-schema">

<xsd:element name="bookstore " type="bookstore Type"/>

<xsd:complexTyp e name="bookstore Type">
<xsd:sequence maxOccurs="unbo unded">
<xsd:element name="book" type="bookType"/>
</xsd:sequence>
</xsd:complexType >

<xsd:complexTyp e name="bookType" >
<xsd:sequence >
<xsd:element name="title" type="xsd:strin g"/>
<xsd:element name="author" type="authorNam e"/>
<xsd:element name="price" type="xsd:decim al"/>

</xsd:sequence>
<xsd:attribut e name="genre" type="xsd:strin g"/>
</xsd:complexType >

<xsd:complexTyp e name="authorNam e">
<xsd:sequence >
<xsd:element name="first-name" type="xsd:strin g"/>
<xsd:element name="last-name" type="xsd:strin g"/>
</xsd:sequence>
</xsd:complexType >

</xsd:schema>
.