| 摘要 |
PROBLEM TO BE SOLVED: To provide a data base for efficiently dealing with a large amount of XML documents. SOLUTION: An XML-RDB gateway 100 registers an XML document in a relational data base by a registering unit 110, and executes necessary processing by accepting an inquiry to XML data registered by an inquiry unit 120. A data base registering part 116 maps the XML document inputted to an XLM document inputting part 112 according to regulations stored in a mapping definition storing part 114, and registers the XML document in a data base. This regulations are decided so that those of element values and attribute values included in a certain element where the upper limit of the number of appearance is fixed can be stored in the upper limit number of fields arranged in a table in a hierarchy corresponding to the element. COPYRIGHT: (C)2004,JPO
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