Combining the Power of Searching and Querying

EquiX is a search language for XML that combines the power of querying with the simplicity of searching. Requirements for search languages are discussed and it is shown that EquiX meets the necessary criteria. Both a graphical abstract syntax and a formal concrete syntax are presented for EquiX queries. In addition, the semantics is defined. It is shown that EquiX has an evaluation algorithm that is polynomial under combined complexity.