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47 Extents

An extent is somewhat the generalisation of a marker object within the text.

To be precise, An extent is a region of text (a start position and an end position) that is displayed in a particular face and can have certain other properties such as being read-only. Extents can overlap each other. SXEmacs efficiently handles buffers with large numbers of extents in them.

Function: extentp object

This returns t if object is an extent.


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