It now offers country-specific datasets for more than 2.5m albums and 23.5m songs.

This data can be organised by mood, theme and genre with relational links to streamline search and discovery for the customer.

Rovi EVP of data services John Moakley says, "The uptake of digital music has quickly taken off across the world, and people's collections of music in their homes are continuing to grow tremendously.

"When consumers are searching for music for a particular occasion or just to ...