ZeroXML is a cross-platform and lightweight XML file abstraction layer that gets it's name from the fact that it can read XML files without allocating any memory for internal use. The library supports both little-endian and big-endian systems and is known to work on Windows, Linux and IRIX. Full documentation is included in the package.

To achieve zero memory allocation operation the library maps the file to a memory region and walks the XML tree every time a new node is accessed. XML processing might be a bit slower this way but application memory will not get fragmented.

Memory will only be allocated to handle client application requests. In all cases a preallocated buffer can be provided by the client application to store XML data for further processing.

A separate caching option is available that will create a node tree when a XML file gets opened. As a result node searches will be much faster at the cost of a small amount of memory (less than 16 bytes for every XML node in the file).