Schema-Based Constrained XML Data Indexing and Storage Technique

The XML Schema describes XML document pattern information standard as a W3C formulation; it is not only integrated and exchanges XML document data to provide valid confirmation for different enterprise information, supporting document renewal effectively.The article proposes a schema based on XML Schema memory and index XML document technology and avoids the connection operation which the multi-tables save, when inquiry and renewal data does not need to traverse the XML document tree, has the high spatial use factor and the low index maintenance price, and support includes the many predicate complex inquiry. This article proposes the technology mainly is suitable for structurized and half structurized data, and requests the XML documents to have the pattern definition, however many document data do not have the pattern definition, meets down how is the prime task studies through traversal the XML documents to extract its Schema pattern, and further discusses the operation mechanism take this as the foundation which the documents renew. At the same time, regarding take the documents as the central non-structurized data memory and the inquiry also is our research key. Finally the two union establishment prototype system, adopts regarding structurized and half structurized data based on the Schema pattern restraint index and based on the relational memory, but should adopt the pure XML text document regarding the nonstructurized data the memory and the full text retrieval mechanism.