[1] : The Free On-line Dictionary of Computing (27 SEP 03)

data dictionary
     
         a data structure that stores meta-data, i.e. data
        about data.  the term "data dictionary" has several uses.
     
        most generally it is a set of data descriptions that
        can be shared by several applications.
     
        usually it means a table in a database that stores the
        names, field types, length, and other characteristics of
        the fields in the database tables.
     
        an active data dictionary is automatically updated as changes
        occur in the database.  a passive data dictionary must be
        manually updated.
     
        in a dbms, this functionality is performed by the system
        catalog.  the data dictionary is a more general software
        utility used by designers, users, and administrators for
        information resource management.
     
        the data dictionary may maintain information on system
        hardware, software, documentation, users, and other aspects.
     
        data dictionaries are also used to document the database
        design process itself and can accumulate meta-data
        ready to feed into the system catalog.
     
        does anybody call them "codebooks"?
     
        2001-04-24
     
     
see also:
meta-data data data descriptions table database field 
types dbms system catalog information resource management 

Data Dictionary >> D Words
Data Dictionary, definition of term: Data Dictionary
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Data, definition of term: Data
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Data Path >> D Words
Data Path, definition of term: Data Path
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Data Warehouse >> D Words
Data Warehouse, definition of term: Data Warehouse
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