XML publishing support

IBM^® Informix^® IDS 11.10 introduced a set of XML built-in functions when the idsxmlvp virtual processor is turned on. Built-in XML functions are of two types: Those returning LVARCHAR values, and those returning CLOB values. For example, genxml() returns an LVARCHAR(32739), while genxmlclob() returns a CLOB. XML data is typically stored in LVARCHAR or CLOB columns.

Genero BDL partially supports XML functions:

Because Genero BDL does not support BLOB/CLOB types, functions returning CLOB values cannot be used. You can however use the XML functions returning LVARCHAR values, and fetch the result into a VARCHAR variable of the appropriate size.
Some of the XML functions such as genxml() take ROW() values as parameters. Because literal unnamed ROW() expressions are like regular function calls, you can use XML functions in static SQL statements.

Example:

FUNCTION get_cust_data(id)
   DEFINE id INT, v VARCHAR(5000)
   SELECT genxml(ROW(cust_name, cust_address), "custdata") INTO v
      FROM customers WHERE cust_id = id
   RETURN v
END FUNCTION