| 摘要 |
PROBLEM TO BE SOLVED: To provide an XML document inquiry language processor which can make the processing operation of description contents flexible and high-grade without changing an existing inquiry language taking XML documents as the object. SOLUTION: The processor is provided with an inquiry means 1 which makes an inquiry about document data described in an XML document form, a conversion means 4 which analyzes the inquiry to convert it into an internal form, an execution means 5 which executes inquiry contents on the basis of the converted internal form to output document data, and an external function preservation means 6 where external functions which are described in a general programming language and are used for processing which cannot be performed by description contents processing of the query language are preserved, and the inquiry means 1 is provided with an external function definition means which defines external functions while making processing contents described in the general programming language correspond to processing contents described in the XML language in order to performing processing in accordance with a program described in external functions. When an external function is designated in the inquiry, the execution means 5 calls the external function to execute a processing described in the general programming language. |
