  The need for discovering knowledge from XML documents according to both
structure and content features has become challenging, due to the increase in
application contexts for which handling both structure and content information
in XML data is essential. So, the challenge is to find an hierarchical
structure which ensure a combination of data levels and their representative
structures. In this work, we will be based on the Formal Concept Analysis-based
views to index and query both content and structure. We evaluate given
structure in a querying process which allows the searching of user query
answers.
