如何度量/估计XML编程工作的规模?

To set the scene - I work in one of those industries that loves estimating and tracking pretty much everything. One of our key metrics is SLOC (source lines of code - declarative and executable statements). We use it for project size and cost estimation, project planning, and many other things. We try to use it to compare apples to apples (ie, we don't compare SLOC in one language/domain to SLOC in another language/domain). To set the scene - I work in one of those indus