Tools and techniques used for automatic and smart analysis of huge data repositories of industries, governments, corporations and scientific institutes are the subjects dealt by the field of Knowledge Discovery in Databases (KDD). In MATRIKS context, a framework for KDD, SKDQL (Structured Knowledge Discovery Query Language) is the proposal of a structured language for KDD specification, following SQL patterns within an open and extensible architecture, supporting heterogeneity, interaction and increment of KDD process, with resources for accessing, cleaning, transforming, deriving and mining data, beyond knowledge manipulation.