Hi Everybody, Property tree is a data structure - a tree of (key, value) pairs. It differs from its cousin, "usual" PropertyMap, because it is hierarchical, not linear. Thus, it is more like a minimalistic Document Object Model, but not bound to any specific file format. It can store contents of XML files, windows registry, INI files, even command line parameters. The library contains parsers for all these formats, and more. I tried to make the library as high quality as possible before posting here, so it contains a (hopefully) full documentation, and a comprehensive set of regression tests - more than 300 test cases. By any chance it is not a substitute for (upcoming?) boost XML library - it only supports a fairly narrow subset of XML, and focuses rather on being format-independent. I uploaded it to the vault root dir, file name is property_tree.zip. For more curious, excerpt from the doc: Property tree is a recursive data structure that stores a single data string, and an ordered list of (key, value) pairs, where value is a property tree itself. It therefore forms a tree, hence the name. It is a versatile structure that can store in uniform way data coming from various sources, such as XML or INI files, as well as windows registry, program command line etc. Property tree interface is similar to the interface of a standard C++ container. It supports iterators, insertion, erasing, searching etc. One can think of it as a sort of Document Object Model, which is minimalistic, not bound to any specific file format, designed to be easy to use, and comes as Boost-compatible, headers only C++ library. Many software projects develop a similar tool at some point of their lifetime, and property tree long ago originated the same way. I hope the library can save many from reinventing the wheel. cheers, Marcin Kalicinski