Systems biology will fully develop its potential when researchers are able to make use of all the available data. To fulfill this goal it is needed to overcome two major challenges: how to store and make data and knowledge accessible; and how to integrate
and analyze data from different sources and of different types. Hence, this chapter is divided into two sections. The first section describes public storage resources such as experimental data repositories, ontologies and knowledge databases; however
we will not discuss the (relevant topic of) requirements for a data-warehouse capable of managing several databases in an inter-operable manner (Kimball and Ross 2002). The second section reviews available tools and algorithms that are useful for
integrating different types of data sets. However, since a comprehensive enumeration is beyond the scope of this chapter, we present some representative examples.
In this chapter we list integrative tools using open source codes and public repositories and databases. The relevant R packages (Ihaka and Gentleman 1996) are highlighted in bold.
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