Development of audiovisual content recognition tools will be a task for industries which will build and sell MPEG-7 enabled products. Also for these standards, coding tools were built for research purposes, but they did not become part of the standard itself. In the same way that MPEG will not standardize the tools to generate the description, MPEG-7 will also not standardize the tools that use the description. It might however be necessary to address the interface between the description and the search engine. The words descriptions or features represent a rich concept, that can be related to several levels of abstraction.
Descriptions vary according to the types of data.
Furthermore, different types of descriptions are necessary for different purposes of the categorization. The descriptions that conform to the MPEG-7 standard could be entered by hand, but they could also be automatically extracted. MPEG work is usually carried out in two stages, a competitive and a collaborative one. In the competitive stage, participants work on their technology by themselves. In answer to the CfP, people submit their technology to MPEG, after which MPEG makes a fair comparison between the submissions.