A Reference Feature is a feature referenced at multiple places in a design file. This feature allows us to group together separate graphical elements, spanning over several maps, which represent the same item. For instance, a reference feature should be used in place of a regular SEF feature when a road spans over more than one map.
There are three parts to a SEF Reference Feature: reference attributes, any number of nongraphical components, and any number of graphical feature references.
The specific attributes for a SEF reference feature are shown below:
|
Keyword Suffix |
Value |
Required/Optional |
|
sef_st {<number>} |
This is a text string with a maximum of 31 characters specifying the state of the feature. Note that <number> is an integer which starts from 0 to indicate the order of the feature states. If none is specified, an empty string is used. |
Optional |
|
sef_out_of_ |
If the feature continues beyond the area defined by the index shapes in a SEF file, then this should be specified as yes. Use this only if the user is not certain about which component is out of scope. If he/she knows which component is out of scope, this tag should be used within the component. Range: yes Default: No default |
Optional |
|
sef_ref_key |
This represents the key or ID number of the multi-referenced features. Use this key only when the graphic references are not all included in a single reference section. |
Optional |
|
sef_reload |
This is the reload option for the reference feature. Range: NO_RELOAD | LITE Default: No default |
Optional |
|
sef_wid |
This is the workset ID of the unloaded workset. |
Optional |
|
sef_schema_no |
This is used with the sef_wid to uniquely identify a workset. |
Optional |