Software is easy to describe through diagrams, flow charts and descriptive text.

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"Video search is difficult, " he says, explaining that most video search looks for descriptive text in tags attached to the video, which can be incomplete or misleading.

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These APIs enable the recognition of music from text lookups, CDs, digital files and audio captured with a mobile device, and returns descriptive metadata for more than 2, 000 music genres and sub-genres, artist origins, and more than 100 music moods.

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The program detects the topic of a text and on that basis applies particular metrics to determine, say, if numbers are more important than descriptive words, and extracts critical sentences accordingly.

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