Interesting overview of development at Google. I included it as a background for the question:
How would you use topic maps as part of documenting a development process?
Or perhaps better: Are you using topic maps as part of a development process and if so, how?
Now that I think about it, there may be another way to approach the use of topic map in software engineering. Harvest the bug reports and push those through text processing tools. I haven’t ever thought of bug reports as a genre but I suspect it has all the earmarks of one.