Rebecca Parsons, ThoughtWorks

As Agile becomes more accepted as a software development methodology, concerns from architecture groups are increasing. Enterprises have legitimate concerns that are often addressed by architects.

However,the traditional ways that architects engage with development groups do conflict with Agile methods. This talk describes the ways that Agile methods can benefit architects, addresses concerns architects express about agile, and finally proposes some ways that architects and agile development teams can become allies.

Domain Specific Languages (DSLs) are an old technique in software development that's getting a recent resurgence in interest. Most developers run into them regularly - as XML configuration files, regular expressions, query languages or build scripts. However they haven't been given the attention they deserve and there is very little information out there to help developers build them effectively. We find that few people have done much to build their own DSLs and even fewer have a broad appreciation of the various techniques involved.

This tutorial is a step towards closing this gap. We'll begin by introducing the three main categories of DSLs: External, Internal, and Language Workbenches. We'll talk about the advantages of DSLs and the problems in using them, so that you'll appreciate what the different styles look like and when you might want to build them. In the second part we'll go into more details on techniques of working with each of the three styles, to get you started on your own work.

We are currently working to develop a coherent pedagogic framework (if you'll forgive a pretentious name) for DSLs, this tutorial is an opportunity to catch up with our work. However it does come with a caveat: we are still very much in the middle of the process of capturing and organizing this knowledge. As a result we won't be describing a finished body of knowledge, but rather one that is still evolving.