A relative rotation temporary stop mechanism 14 is integrally provided in a first rotor 11, and has a lock mechanism 140 elastically displaceable relative to the first rotor 11, and a lock recess portion 120a provided in a second rotor (stator) 12. The lock mechanism 140 has a lock protrusion portion 140a and an inclined portion 140b at its top end portion and at its base end portion respectively such that the lock protrusion portion 140a is fitted to the lock recess portion 120a. When an external connector A is connected to a direct connector 15, the inclined portion 140b is pushed by the external connector A to make the lock mechanism 140 move so that the lock protrusion portion 140a comes off from the lock recess portion 120a.

A computer system comprises program products represented by a database management system, a first dictionary for registering and managing the definition data required for executing each of the program products and a second dictionary for storing and managing the structure definition data of the first dictionary. Each of the program products, for example a database system and a system development support tool, has added thereto in advance their structure definition data relating to all the definition data including the data required for executing each of the program products. The computer system creates the first dictionary on the basis of the structure definition data held by the program products in response to the demand for creating the first dictionary.

In a data base system management system having a dictionary for maintaining a list of sets of data associated with each of a plurality of user application programs, a method and apparatus for decreasing the data base access time by forming a data model of the logical relationship of said list, generating static access modules, creating a secondary data model in a pre-built machine executable format and storing the data model. In the execution stage accessing the secondary data model and manipulating data values using the secondary data model.

A computer-based workstation for logical diagram generation from structured text written in any natural language is disclosed. With the invention, a user can quickly indicate the logical structure of a text in computer memory using a prescribed set of symbols, instruct the computer to generate a logical digram corresponding to the text, and finally to interactively view and edit the diagram. A user is therefore able to describe in both words and graphical images a procedure or set of instructions.

A derived database processing system in a database processing device comprises a plurality of independent databases which can provide a plurality of users with a group of data to be shared for a common purpose. The derived database processing system comprises a dictionary for managing database logical definition information and database storage information in a secondary memory, a derived database registering unit for determining a definition frame of a new name without violating a definition frame of a name used in a schema definition which defines data in a database, a dictionary information manipulating means for referring to said dictionary when the manipulation target is a derived database, then selecting necessary components of said database, and a database processing procedure generating unit, in a binding process to optimize access routing in a database. The derived database processing means also comprises a database definition management means which replaces an old version of a database definition information with a new version by utilizing a consistency monitoring means and an integrity monitoring means associated with it.