OML is an instrumentation tool that allows application writers to define customisable measurement points (MP) inside new or pre-existing applications. Experimenters running the applications can then direct the measurement streams (MS) from these MPs to remote collection points, for storage in measurement databases.
OML was originally conceived to provide measurement facilities for OMF-enabled testbeds, such as the Wireless ORBIT Testbed. It is now a stand-alone tool which can also be run independent of OMF. OML is now a generic software framework for measurement collection.