Microsoft XML - XML schema validation of one xml block based on values from another xml block

Author

XML schema validation of one xml block based on values from another xml block

Andy

2004-11-18, 7:17 pm

Hi!

Is possible to do XML validation of one XML block based on values from
another XML block?

For example, I have an input XML file containing account types.
<Root>
<AccountTypes>
<AccountType></AccountType>
…………………………………..
</AccountTypes>

<Accounts>
<Account>
<AccountType></AccountType>
</Account>
</Accounts>
</Root>

Is there a way I can put restriction in schema that <Account> must
have only such <AccountType> that are listed in <AccountTypes>

The file size is 20-25 MB. (It would not be a good idea to load it
into DOM)
It is preferably to catch it before processing will start

Thank you,
Andy

Andy

2004-11-26, 7:20 pm

Hi Martin!

Thank you!!! It works.

I tried before this samples, but it did not work.
http://msdn.microsoft.com/library/d...fkeyelement.asp

After I moved <xs:keyref... from <xs:element name="A' into <xs:element
name="Root" ...
as you did in your samples it worked.

Thank you.

Martin Honnen <mahotrash@yahoo.de> wrote in message news:<ONyyPwjzEHA.1292@TK2MSFTNGP10.phx.gbl>...
> Andy wrote:
>
>
>
> You can specify key/keyref constraints, see
> http://www.w3.org/TR/xmlschema-0/#s...eysAndtheirRefs
> here is a simple example
>
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
> version="1.0">
>
> <xs:element name="root">
> <xs:complexType>
> <xs:sequence>
> <xs:element ref="account-types" />
> <xs:element ref="accounts" />
> </xs:sequence>
> </xs:complexType>
> <xs:key name="accountTypeKey">
> <xs:selector xpath="account-types/account-type" />
> <xs:field xpath="." />
> </xs:key>
> <xs:keyref name="refAccountTypeKey" refer="accountTypeKey">
> <xs:selector xpath="accounts/account/account-type" />
> <xs:field xpath="." />
> </xs:keyref>
> </xs:element>
>
> <xs:element name="account-types">
> <xs:complexType>
> <xs:sequence>
> <xs:element name="account-type" maxOccurs="unbounded"
> type="xs:string"/>
> </xs:sequence>
> </xs:complexType>
> </xs:element>
>
> <xs:element name="accounts">
> <xs:complexType>
> <xs:sequence>
> <xs:element ref="account" maxOccurs="unbounded" />
> </xs:sequence>
> </xs:complexType>
> </xs:element>
>
> <xs:element name="account">
> <xs:complexType>
> <xs:sequence>
> <xs:element name="account-type" type="xs:string" />
> </xs:sequence>
> </xs:complexType>
> </xs:element>
>
> </xs:schema>
>
> then in the XML instance file
>
> <?xml version="1.0" encoding="UTF-8"?>
> <root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xsi:noNamespaceSchemaLocation="test2004111901Xsd.xml">
> <account-types>
> <account-type>free</account-type>
> <account-type>normal</account-type>
> </account-types>
> <accounts>
> <account>
> <account-type>normal</account-type>
> </account>
> <account>
> <account-type>super</account-type>
> </account>
> </accounts>
> </root>
>
> the account-type "super" is flagged as an error.