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What do you understand by the documentation type of application software on the computer system?

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What do you understand by the documentation type of application software on the computer system? Document file application included the text data options to edit the text data in the pages on the application to make a change into the entered text data. The user can type text data using the keyboard input device because the keyboard input device is used to send the data into the document file application software and it allows the keyboard input device to take input data and some mouse input device to make an editing work on the document file application software. Document application provides the text data file to the user when the user gives a command to generate the new file then the file will be generated from the application software. The user can use the file when the user wants to edit on the file through the application software to apply some editing operations such as:- the text data can be edited from the editing options available on the application software to perform in form
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What do you mean by the "Mapping" of the database structure in DBMS?

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What is “Mapping” in the DBMS?

Mapping in DBMS {Database Management System}

The mapping is a link or connect and equality to describe between view level, conceptual level and internal level.

It used to describe how they are connecting to each other in three levels.

It is a process to convert a request of external level which is request both the two level such as logical level and physical level.

Simply it is a map of Database structure which shows the links of the three levels basically.

There are two types of mapping in DBMS.

  • External conceptual mapping
  • Internal conceptual mapping
In the DBMS each users refers only its own external schema. Hence the DBMS must transform a request on a particular or specified external into the request against to the conceptual schema which means logical level of schema in the logical refers where the logical term has perform in the database and then into the request against internal schema which means the internal is schema in the physical level where the physical structure has their connectivity of the database to computer system or any hardware connectivity show in the physical level store and retrieve data to the database and from the database.

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