Do you know HTML, the common standard for web pages? PMML is the same idea applied to data mining. PMML stands for Predictive Model Markup Language. It is a standard using XML notation to deploy data mining model in the industry. PMML standard comprises data pre-processing and modelling.
The book contains a good (but short) introduction to the standard. Only a few schemas about the various steps of the process are given. Most of the book focuses on the different parts of the standard, illustrated with code snippets. The main objective of this standard is to reduce time to market when deploying data mining solutions.
The book is really useful if you want to deploy your solution using PMML. If you are interested to know more about this standard, this is not the right book (but maybe the only one?). It contains a lot of code, but no case study. This would have been a plus, since most of the material can certainly be found on the web.