dxf file format presentation
DESCRIPTION
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DXF file formatPRESENTED BY: MAHA MOSTAFA ELZIADY
MAHMOUD SALAH ELDIN MOHAMED HASHEM
PRESENTED TO : DR. MOHAMED AWAD
SRMANF
Neutral Data Files
Neutral data files and neutral file interfaces are needed in order to exchange product data between CAD systems
Neutral data file
DXF file
AutoCAD DXF (Drawing Interchange Format, or Drawing Exchange Format). DXF was originally introduced in December 1982 as part of AutoCAD 1.0, and was intended to provide an exact representation of the data in the AutoCAD native file format
HEADER
General information about the drawing. Each parameter has a variable name and an associated value.
CLASSES
Holds the description of any application-defined classes of objects that may be instantiated in the BLOCKS or ENTITIES sections.
TABLES
Contains several lists of information used in the rest of the drawing, such as the list of line types, layer names, fonts, and preset views of the drawing
BLOCKS
Contains predefined drawing elements that might be present in the drawing. For example, a block could define a standard door knob that is placed on every door in a drawing. Block definitions are referenced in the ENTITIES section with the INSERT command
ENTITIES
Contains the actual object data of the drawing. This can include raw data such as LINE and ARC entities as well as INSERT commands that place a predefined block definition at a certain position in the drawing.
OBJECTS
Contains non-graphical parts of the drawing. All entities that are not part of the entities or symbol tables are "objects." For example, AutoCAD dictionaries are stored here