Note that this means, unlike vowels, intervening H and W characters do not act as a barrier to combining runs of letters with the same code.

In one sense, you're still depending on the word of others; open source does remove a major barrier by giving you the program code but that's only part of the puzzle.

While this is easy to encapsulate, it's still a portability barrier because it requires you to rewrite your lookup and calling code, effectively tying your application to the JBoss platform.