...Atsushi Keyaki; Jun Miyazaki; Kenji Hatano; Goshiro Yamamoto; Takafumi Taketomi; Hirokazu Kato Purpose The purpose of this paper is to propose methods for fast incremental indexing with effective and efficient query processing in XML element retrieval. The effectiveness of a search system becomes...

...Sherif Sakr; Ghazi Al‐Naymat Purpose The purpose of this paper is to provide a detailed discussion for different types of graph queries and a different mechanism for indexing and querying graph databases. Design/methodology/approach The paper reviews the existing approaches and techniques...

... the types of approximations allowed. A specifically devised index structure which efficiently supports both semantic and structural approximations, according to the specified user preferences, is proposed. Also, a ranking model to quantify approximations in the results is presented. Findings...

... a better data organization for native XML databases, named sibling‐first (SF) format that improves query performance significantly. SF uses an embedded index for fast accessing to child nodes. It also compresses documents by eliminating extra information from the original DF format. The converted SF...