contrib\xml2 package's xpath_table function in PostgreSQL

Hi,

We have a huge system based on PostgreSQL with xml2 functions. From the PostgreSQL 8.4 documentation F.38.1. Deprecation notice, it looks like those functions are removed. However, our solution is very huge, and heavily depends on them.

1. Could you please give me some instructions to get them back in the PostgreSQL 8.4?

2. Could you please also give me some details if we can find similar functions we can use to replace them in PostgreSQL 8.4?

Thank you in advance.

Best,
Michael

PS. Attached copied from PostgreSQL 8.4 documentation:
================================

F.38. xml2

The xml2 module provides XPath querying and XSLT functionality.

F.38.1. Deprecation notice

From PostgreSQL 8.3 on, there is XML-related functionality based on the SQL/XML standard in the core server. That functionality covers XML syntax checking and XPath queries, which is what this module does, and more, but the API is not at all compatible. It is planned that this module will be removed in PostgreSQL 8.4 in favor of the newer standard API, so you are encouraged to try converting your applications. If you find that some of the functionality of this module is not available in an adequate form with the newer API, please explain your issue to pgsql-hackers(at)postgresql(dot)org so that the deficiency can be addressed.