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The first step in building a Java Stored Procedure for XML Schema validation is to download the components and decide the environment requirements.The components you need are: section to download the latest version of XDK for Java.In Oracle XML DB, BEGIN -- Delete the schema, if it already exists; otherwise, this produces an error.DBMS_XMLSCHEMA.delete Schema(' END; / BEGIN -- Register the schema DBMS_XMLSCHEMA.register Schema(' '', TRUE, TRUE, FALSE); END; / -- Create table to hold XML instance documents DROP TABLE po_tab; CREATE TABLE po_tab (id NUMBER, xmlcol XMLType) XMLType COLUMN xmlcol XMLSCHEMA " ELEMENT "purchase Order"; INSERT INTO po_tab VALUES(1, XMLType( ' ipo:purchase Order: ship To: name: Helen Zoe street:100 Broadway city: Cardiff state: Wales country: UK zip: CF2 1QJ bill To: name: Robert Smith street:8 Oak Avenue city: Old Town state: CA country: US zip:95819 items: Often, besides knowing that a particular XML document is well-formed, it is necessary to know if a particular document conforms to a specific XML schema, that is, is VALID with respect to a specific XML schema.It does not change the validation status of the XML instance.
If a field in a table is optional, it is possible to insert a new record or update a record without adding a value to this field. Note: It is very important to understand that a NULL value is different from a zero value or a field that contains spaces.Because full XML schema validation (as specified by the W3C) is an expensive operation, when instances are constructed, stored, or retrieved, they are not also fully validated.To validate and manipulate the validation status of XML documents, the following functions and procedures are provided: checks if the input instance conforms to a specified XML schema.You need to set xmlparserv2.jar, and classes12to the CLASSPATH. If you are using JDK 1.1.x, classes111is required to be used. Before loading the Schem Util.class into the Database, we need to check if the correct version of the two dependent XDK Packages are loaded into the logon database schema (in this case xdkdemo/xdkdemo).Before loading the Schema Util.class, make sure that the loaded XML Parser has the same version with which you compiled the Schema Util.class.