| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method of developing a database for a railroad signal system, capable of handling many control elements as data, securing reliability and consistency of data to be transmitted, defining various data formats with ease, realizing transition from an existing database with ease and at a low cost, thus securing data compatibility between systems. <P>SOLUTION: This system develops a railway signal system database language RSDBL, creates a pre-verified RSDB 10 with the RSDBL, describes an RSDBL schema 20 with an XML schema language, and verifies the pre-verified RSDB 10 data by utilizing a multipurpose XML purser corresponding to the schema language applied to the RSDBL schema 20. An additional verification program 40 verifies a constraint for data which cannot be described in the RSDBL schema 20, thus completing creation of a verified RSDB 10. <P>COPYRIGHT: (C)2004,JPO</p> |
