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3.2 Service Complex: Object Management  
SOM01 - Creating, Storing, Administration of Data Structures and Data of the SDE  

  LOBV01 - Datenstrukturen und Daten der SEU erstellen, speichern, verwalten

Contents  
  • 1 Allocation to V-Model and Methods Allocation
  • 2 Brief Characteristics
  • 3 Requirements
  •       3.1 Requirements for Interfaces
  •       3.2 Requirements for the Methods Support
  •       3.3 Requirements for Functions
  •       3.4 Other Requirements
  • 1 Allocation to V-Model and Methods Allocation

    not applicable

    2 Brief Characteristics

    This service unit contains the requirements for tools used for the permanent storage of results, products, and objects. This service unit also contains requirements for a repository by means of which the tools can communicate with each other. This service unit is used to request the following concepts:

    3 Requirements

    3.1 Requirements for Interfaces

    SOM01.I.1 Data and message interfaces It is possible to exchange data and messages without further transformation with other tools via disclosed and documented interfaces.

    Without further transformation means that the data and message exchange between individual tools is realized via standardized sections from the schema definition of SOM01 (e. g. data for data flow modeling via a standardized meta-structure to data flow diagrams).

    SOM01.I.2 Interface to SSEC03 - Access Control All access trials to objects that are subject to the object management are first subjected to the access control.

    3.2 Requirements for the Methods Support

    none

    3.3 Requirements for Functions

    SOM01.F.1 Central data management
    SOM01.F.1.1 Repository A logic central data management (repository) exists where the description and administration of all metadata of the SDE and the corresponding interconnections will be realized.
    It is not necessary that the storage of the data management is physically contiguous.
    SOM01.F.1.2 Storage of graphics It is possible to store graphics together with the information they are based on in a central database. Based on this information the graphics can be automatically reproduced.
    The (sub-) information which is the basis for the graphics can be linked with other information in the central database.
    SOM01.F.1.3 Modification of graphics After the modifications of a graphic picture the information that graphics are based on is automatically updated as well in the central database-and vice versa.
    SOM01.F.1.4 Predefined submodels There are predefined meta-models where all meta-objects of a minimum SDE equipment have been described.
    SOM01.F.1.5 Links It is possible to link all objects with each other and also to dissolve these links.
    It must be possible for the user to initiate setting up or dissolving links. E. g. during the data flow modeling it must be possible for the user to allocate E/R submodels to data stores, data flows, and processes of a certain data flow diagram.
    This allocation can also be dissolved by the user.
    SOM01.F.2 Schema definition
    SOM01.F.2.1 Data Description Language A data description language exists to formulate the data schema including the metadata schema.
    SOM01.F.2.2 Object types It is possible to define object types.
    SOM01.F.2.3 Association It is possible to define associative object types.
    SOM01.F.2.4 Subtypes It is possible to define subtypes.
    SOM01.F.2.5 Binary relationship types It is possible to define binary relationship types between object types.
    SOM01.F.2.6 Cardinalities It is possible to print out cardinalities for relationship types.
    SOM01.F.2.7 Attributes It is possible to define attributes for object types.
    SOM01.F.2.8 Unstructured attributes It is possible to define unstructured attributes of optional lengths (long fields).
    SOM01.F.2.9 Domains It is possible to define domains and to allocate them to objects.
    SOM01.F.2.10 Structure nesting It is possible to structure complex object types.
    SOM01.F.3 Databases
    SOM01.F.3.1 Views It is possible to define views for database.
    SOM01.F.3.2 User allocation It is possible to allocate databases to users.
    SOM01.F.3.3 Private It is possible to set up both public and private databases.
    SOM01.F.3.4 Project-specific It is possible to set up project-specific databases.
    SOM01.F.4 Keys
    SOM01.F.4.1 Primary keys It is possible to define a primary key for each object type.
    SOM01.F.4.2 Secondary keys It is possible to define secondary keys.
    SOM01.F.5 Access Generally it is possible to read, write, modify, and delete every object.
    SOM01.F.6 Persistence All objects (including meta-objects) are permanently stored between two accesses.
    SOM01.F.7 Schema modifications
    SOM01.F.7.1 Meta-objects It must be possible to read, write, modify, and delete it each meta-object of the schema (object types, relationship types, views, etc.).
    SOM01.F.7.2 Schema modification It is possible to modify the schema.
    SOM01.F.7.3 Data acceptance In case of schema modifications it is possible to transfer the previously stored data to the new schema.
    SOM01.F.8 Attributes It must be possible to read the attributes of every object; it must also be possible to modify all of them with the exception of the key attributes.
    SOM01.F.9 Multi-user processing It is possible for all operations to be executed by several users simultaneously.
    SOM01.F.10 Transactions
    SOM01.F.10.1 Transactions It is possible to realize transactions.
    SOM01.F.10.2 Rollback After canceling a transaction, it is possible to automatically reset to the state prior to the begin of the transaction.
    SOM01.F.10.3 Forced rollback It is possible to reset a transaction. (rollback) explicitly.
    SOM01.F.10.4 Nesting It is possible to nest transactions.
    SOM01.F.11 Structured objects (complex objects)
    SOM01.F.11.1 Structured objects It is possible to define and administer structured objects.
    SOM01.F.11.2 Unit There are operators to generate, process and delete handling the structured objects as a unit.
    SOM01.F.12 Operating modes
    SOM01.F.12.1 On-line On-line data access is possible.
    SOM01.F.12.2 Batch Data access in background mode (batch) is possible.

    3.4 Other Requirements

    none

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