Key:railway:signal:main:form
		
		
		
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| Description | 
|---|
| The physical format of the signal: light, semaphore or sign.  | 
| Group: railways | 
| Used on these elements | 
| Requires | 
| Status: de facto | 
| Tools for this tag | 
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railway:signal:main:form=* is used to describe the physical format of a railway main signal.
Three different types are known:
railway:signal:main:form=light– light signalrailway:signal:main:form=semaphore– semaphore signalrailway:signal:main:form=sign– sign
