**6. MapReduce**

*Multimedia Information Retrieval*

**Figure 2.**

**Figure 3.**

*The four sources of big data.*

*The 5 V big data model.*

2.Social media insights: A complementary approach is to collect comments on posts and apply sentiment analysis algorithms to them. Let us mention a few avenues to follow our various accounts: Hootsuite, Radian6 or even the APIs made available and queried with the Power Query add-in for Excel, IRaMuTeQ

3.Behavioral data (third party data) These data are all data on Internet users collected via forms or cookies. Beyond traditional identity information (sex, age, CSP, etc.), it is now much more efficient to measure behavior (navigation, hardware configuration, time spent on pages, etc.). For this, there are specialized web players who help us collect information on our customers or prospects and thus improve communication campaigns. Some players in the field

4.Open and reusable data "Open data" are all open and reusable data, it makes possible to put open data online, to make the data more reliable and to make them reusable and usable, where openness consists in making the data public: free of rights, downloadable, reusable and free. The opening does not apply

of third party data: Bluekai, Exelate, Weborama, Datalogix, etc.

for the analysis of textual data.

**8**
