Abstract: A method for converting directory data is executed to selectively reflect any entry of the directory data onto application data. The directory data converting method includes the steps of searching from the directory data the data of the directory entry specified by a filtering rule corresponding to the application data; converting the searched directory entry data according to the schema conversion rule compatible with the filtering rule used for searching the data; and reflecting the schema-converted entry data onto said application data.

Abstract: A database link control method and apparatus capable of establishing a link between records related to each other and a database system including a database control function. The data base system includes a function for storing information regarding at least one record and a link relating records to each other holds at least one link generating information item necessary to generate a link to relate records to each other. The database system includes a database server including a storage to store information regarding at least one record and a storage to store links relating records to each other and a database client. The client holds at least one link generating information item necessary to generate a link to relate records to each other.

Abstract: A directory system for performing replication of directory data, in which a directory server on the consumer side can reconstruct replica data using a backup kept at any point in time. Information 10c for specifying the entry changed for the last time by replication performed by replication service 10′ is recorded into the replica data 9c managed by the directory server on the consumer side. Based on this information, the replication service 10′ can know the entry on which next replication is to be performed. Thus, the replication service 10′ can recognize the difference between the master data 9s managed by the directory server on the supplier side and the replica data 9c, and can perform replication on this difference when only the replica data 9c is reconstructed using the backup.

Abstract: A network system includes a directory server having a database for storing directory information, and at least one client connected to the directory server through a network. The client issues statements for defining a transaction. The directory server includes a non-transaction processing unit for processing each of access requests from the client as a different transaction, a transaction processing unit for processing a sequence of access requests from the client as a single transaction, a phase management table for storing a connected client and a processing phase for an access request, and a phase management unit for determining whether an access request from a connected client is defined as a transaction, storing a processing phase in the phase management table, and passing the access request from the client to the non-transaction processing unit or to the transaction processing unit based on the stored processing phase.

Abstract: A network system includes a directory server having a database for storing directory information, and at least one client connected to the directory server through a network. The client issues statements for defining a transaction. The directory server includes a non-transaction processing unit for processing each of access requests from the client as a different transaction, a transaction processing unit for processing a sequence of access requests from the client as a single transaction, a phase management table for storing a connected client and a processing phase for an access request, and a phase management unit for determining whether an access request from a connected client is defined as a transaction, storing a processing phase in the phase management table, and passing the access request from the client to the non-transaction processing unit or to the transaction processing unit based on the stored processing phase.

Abstract: A directory system for performing replication of directory data, in which a directory server on the consumer side can reconstruct replica data using a backup kept at any point in time. Information 10c for specifying the entry changed for the last time by replication performed by replication service 10′ is recorded into the replica data 9c managed by the directory server on the consumer side. Based on this information, the replication service 10′ can know the entry on which next replication is to be performed. Thus, the replication service 10′ can recognize the difference between the master data 9s managed by the directory server on the supplier side and the replica data 9c, and can perform replication on this difference when only the replica data 9c is reconstructed using the backup.