US Patent 7778955 Database access system and database access method

Provision of a database access method allowing an open environment such as a Web system to access a main database constituted by a hierarchical database. A system for accessing a hierarchical database, including a storage section for storing schema information related to the hierarchical database converted to tree-structured data, and an access request generating section for generating a second access request to the hierarchical database based on the schema information converted to the tree-structured data corresponding to a first access request.