Reserved CAD fields for MicroStation V8 DGN formats

The following table lists the field names that are reserved for reading and writing V8 DGN CAD data in ArcGIS Desktop. You can use them to override the default output of the Export To CAD tool by adding them to the input feature class table. Fields marked as read-only are exclusive to direct-read CAD (virtual) attribute tables and cannot be used.

Reserved CAD fields for MicroStation V8 DGN formats

Category	Field name	Data type	Length	Description
Element properties	FID	ObjectID	4	A unique feature identifier Read-only
	Shape	Geometry	-	The ArcGIS area shape representing the spatial extent of the CAD file Read-only
	Entity	String	16	The CAD entity Read-only
	Handle	String	16	A unique CAD entity identifier Read-only
	Angle	Double	8	Rotation angle in degrees Point and annotation feature classes only
	<attribute name>	Text, Long, or Double	8	A named user-defined textual entity used for storing data
	CadType	String	255	A valid value overrides the default output element type. Some element types require companion fields that specify parameters. For example: TEXT requires the TxtValue field to specify the text string.
	CadModel	String	255	A DGN file component that contains elements
	Class	String	255	The entity class designation
	Color	Short	2	The display color of the entity expressed as an integer
	Elevation	Double	8	The z-coordinate value of an entity This value specifies the z-coordinate of all vertices of an entity. The field name Contour is a valid alternative to Elevation.
	EntColor	Short	2	The assigned color of the entity expressed as an integer
	EntLinetype	String	255	The assigned line type of the entity
	EntLineWt	Short	2	The assigned line weight of an entity
	Fill	Short	2	Fill pattern name
	GGroup	Short	2	The graphic group to which an entity belongs
	LineWt	Short	2	The display line weight of an entity
	Linetype	String	255	The display line type of the entity
	LTScale	Double	8	The scale of the entity's line type
	MSLink-DMRS	Long	4	A unique identifier used as a primary key for linking a graphic element to a record in an external database table Read-only
	MSCtlg-DMRS	Long	4	An identifier in the MSCatalog relation table that uniquely identifies the table containing the MSLink The MSCatalog table is used by the MicroStation database server and stored in the target database. Read-only.
	QrotX	Double	8	The x-coordinate quaternion (3D) rotation value
	QrotY	Double	8	The y-coordinate quaternion (3D) rotation value
	QrotZ	Double	8	The z-coordinate quaternion (3D) rotation value
	RefName	String	255	The name of the parent object in which the entity resides
	ScaleX	Double	8	The x-coordinate scale value Point and annotation only
	ScaleY	Double	8	The y-coordinate scale value Point and annotation only
	ScaleZ	Double	8	The z-coordinate scale value Point and annotation only
Layer properties	Layer	String	255	The CAD drawing layer name
	Level	Long	4	The CAD drawing layer number identifier
	LvlDesc	String	255	The description of the CAD level Used only with MicroStation V7 and earlier releases
	LvlPlot	Short	2	The CAD plot order of the drawing levels
	LyrColor	Short	2	The CAD drawing layer color expressed as an integer
	LyrFrzn	Short	2	The freeze/thaw state of the CAD drawing layer An attribute value of 1 corresponds to Thawed An attribute value of 0 corresponds to Frozen
	LyrLinetype	String	255	The line type of the CAD drawing layer in which the entity resides
	LyrLineWt	Short	2	The line weight of the CAD drawing layer in which the entity resides
	LyrLock	Short	2	The lock/unlock state of the CAD drawing layer An attribute value of 1 corresponds to Locked An attribute value of 0 corresponds to Unlocked
	LyrOn	Short	2	The on/off state of the CAD drawing layer. An attribute value of 1 corresponds to on An attribute value of 0 corresponds to off
Text properties	FontId	Short	2	The ArcGIS text symbol ID Read-only
	Height	Double	8	The text height in CAD units
	LnSpace	Short	2	The multiline text spacing type Read-only
	SpaceFact	Double	8	The multiline text spacing factor Read-only
	TxtStyle	String	255	The text style
	Text	String	255	The text string
	TxtAttach	Short	2	The multiline text attachment parameter
	TxtBoxHt	Double	8	The text entity bounding box height
	TxtBoxWd	Double	8	The text entity bounding box width
	TxtDir	Short	2	The multiline text direction parameter
	TxtFont	String	255	The text entity CAD font
	TxtJust	String	32	The text entity justification parameter
	TxtHt	Double	8	The text entity height
	TxtMemo	String	2048	The entire text string, not truncated
	TxtOblique	Double	8	The text entity oblique angle
	TxtRefWd	Double	8	The multiline text width factor Read-only
	TxtRotate	Double	8	The text entity rotation angle
	TxtValue	String	255	The text string for new text created from point features when the field CADType contains the keyword TEXT.
	TxtWidth	Double	8	The text entity width factor Read-only
	VertAlign	String	32	The text entity vertical alignment parameter
Document properties	DocName	String	255	The file name of the CAD file including the extension
	DocPath	String	4096	The full path of the CAD file including the file name DocPath can be used to export a single feature class to multiple CAD drawings with the Export To CAD tool when Ignore Paths is unchecked.
	DocType	String	255	The file extension associated with the CAD format
	DocVer	String	16	The CAD format version