The Frontier DOM Extension helps developers to create scripts which can use more than one parser. It also provides a standardized way to manipulate XML data. The Blox Suite support is to come. On this version, I have written scripts to be generic as possible and they should work with Blox tables with a small amount of tweeking. Go to the download page and get the DOM Extension.
Documentation is available online for all the verbs found within it.
W3C's Document Object Model within the Frontier framework, read the implementation notes. The current release may have a number of bugs in it. While this extension does not make any changes to the workings of Frontier, it will make changes to your XML tables. Make copies of your XML data.