In this format, the data is simply stored in a list as found in the AutoCAD file. The data is stored in a single list namedextended_data_list{}。Each value in the list is of the form
Note:这AutoCAD codes associated with each kind of extended entity data are not stored in the FME feature.
Attribute Name |
Content |
application_name |
这name of the application which the following entity data is associated. This application_name remains in effect until another application_name entry is specified. AutoCAD Code: 1001 Example: application_name:ACAD |
autocad_layer |
这name of the layer the extended data is associated. AutoCAD Code: 1003 示例：autocad_layer：水 |
string |
A character string value from 0 to 255 characters in length. AutoCAD Code: 1000 示例：字符串：汤普森 |
| control_string | 用于分组其他扩展实体数据项的开始或结束支架。 AutoCAD Code: 1002 示例：控制：{ |
Binary data |
一个十六进制字符串从0到254个字符ength. AutoCAD Code: 1004 Example: binary:E3B4 |
three_reals |
Three 64-bit floating point numbers separated by commas. AutoCAD Code: 1010,1020,1030 Example: three_reals:2.3,4.5,3.4 |
world_position |
Three real numbers which represent a world position. Each of the numbers is separated by a comma. AutoCAD Code: 1011, 1021, 1031 Example: world_position:23.4, -123.5, 0 |
world_displacement |
Three real values which represent a world displacement value. Each of the values is separated by a comma. AutoCAD Code: 1012, 1022, 1032 Example: world_displacement:1.5, 2.3, 0 |
world_direction |
三个代表世界方向矢量的真正值。每个值由逗号分隔。 AutoCAD Code: 1013,1023,1033 Example: world_direction: 30.0, -12.4, 10 |
real |
一个64位浮点数。 AutoCAD Code: 1040 Example: real:3.1415926 |
distance |
A 64-bit floating point number which represents a distance. AutoCAD Code: 1041 Example: distance:4.56 |
规模 |
A 64-bit floating point number which represents a scaling factor. AutoCAD Code: 1042 Example: scale:34.5 |
16Bit_integer |
A 16 bit integer value. AutoCAD Code: 1070 Example: 16Bit_integer:245 |
32Bit_integer |
A 32 bit integer value. AutoCAD Code: 1071 Example: 32Bit_integer:12983 |
例如，如果以下数据存储在扩展实体数据中：
1001 C_NODE
1000 CONNOBJ_1=43F4
1000 COUNT=3
1000 CONNOBJ_2=43F3
1000 CONNOBJ_3=43F2
1005 163
1010 45.4
1020 -123.5
1030 0
1001 DPRINT
1000 postscript
then the FME AutoCAD reader would store this information as a list within the FME feature:
Attribute Name |
属性值 |
extended_data_list{0} |
application_name:C_NODE |
extended_data_list{1} |
字符串：Connobj_1 = 43F4 |
extended_data_list{2} |
string:COUNT=3 |
extended_data_list{3} |
string:CONNOBJ_2=43F3 |
extended_data_list{4} |
string:CONNOBJ_3=43F2 |
extended_data_list{5} |
handle:163 |
extended_data_list{6} |
three_reals:45.4,-123.5,0 |
extended_data_list{7} |
application_name:DPRINT |
extended_data_list{8} |
string:postscript |
Notice how the AutoCAD codes are converted to attribute tags when stored in the FME features.