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Drawing method, storage method, drawing device and storage device of entity relationship diagram

An entity relationship, entity technology, applied in the direction of instrument, calculation, electrical digital data processing, etc., can solve the problem of inconvenient modification of drawing method, and achieve the effect of modification.

Active Publication Date: 2018-10-16
AGRICULTURAL BANK OF CHINA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] In view of this, the present invention provides a drawing method, a storage method, a drawing device and a storage device of an entity-relationship diagram to solve the technical problem that the drawing method in the prior art is inconvenient to modify

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  • Drawing method, storage method, drawing device and storage device of entity relationship diagram
  • Drawing method, storage method, drawing device and storage device of entity relationship diagram
  • Drawing method, storage method, drawing device and storage device of entity relationship diagram

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Embodiment Construction

[0055]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0056] The entity relationship drawing method provided by the embodiment of the present invention can be regarded as an application program software. If the application program is installed in an electronic device, such as a desktop computer, the electronic device can use the application program to realize entity relationship drawing. see figure 1 , which shows the flow of the method for drawing an entity-relationship diagram provided by an embodiment of the pr...

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Abstract

The invention provides a method for drawing entity relation diagrams. The method includes extracting item identification in drawing instructions when the drawing instructions are received; acquiring a plurality of entity models in preliminarily created model bases by the aid of the item identification; extracting entity relations from preliminarily created relation bases; generating and displaying entity diagrams of the entity models; determining start entity diagrams and termination entity diagrams in the entity diagrams by the aid of the entity relations; generating and displaying connection lines between the start entity diagrams and the termination entity diagrams so as to completely draw the entity relation diagrams. Compared with the prior art, the method has the advantage that a drawing mode of the method is favorable for modifying the entity relation diagrams. The invention further provides a method for storing the entity relation diagrams, a device for drawing the entity relation diagrams and a device for storing the entity relation diagrams. The method for storing the entity relation diagrams is used for generating model tables in the model bases and relation tables in the relation bases.

Description

technical field [0001] The present application relates to the technical field of drawing entity-relationship diagrams, in particular to a drawing method, a storage method, a drawing device and a storage device for entity-relationship diagrams. Background technique [0002] The entity relationship diagram is used to describe the data model of the project, including entities, entity attributes and relationships between entities. Generally, rectangles are used to represent entities, ellipses are used to represent entity attributes, and links are used to connect related entities. The existing drawing method is that the drawing software provides graphical elements such as "boxes" and "arrows", and manually draws the entities, attributes and relationships between entities contained in a certain project. On save, the entire entity-relationship diagram is stored as a file. If you need to modify the entity attributes or the relationship between entities in the entity relationship di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30
Inventor 吴汇川盖金鹏李妍
Owner AGRICULTURAL BANK OF CHINA
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