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Re: doc string for face-attribute-relative-p doesn't help

From: David Kastrup
Subject: Re: doc string for face-attribute-relative-p doesn't help
Date: Mon, 26 Jun 2006 09:45:09 +0200
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux)

Miles Bader <address@hidden> writes:

> Richard Stallman <address@hidden> writes:
>>       Return non-nil if face ATTRIBUTE VALUE is relative.
>>     What does that mean? How is ATTRIBUTE VALUE a face? This is
>>     incomprehensible to me.
>> I don't understand it either.  Can someone explain?
> It returns non-nil if the face attribute ATTRIBUTE is relative when it
> has value VALUE.  "Relative" means that the value doesn't _override_
> that attribute of an underlying face during face merging, but rather
> _modifies_ it.
> For most attributes the only value with that property is `unspecified';
> some attributes have other relative values (for instance, with :height,
> floating-point numbers are relative, as they specify a scale value
> rather than an absolute size).

Fine text for a footnote.

David Kastrup, Kriemhildstr. 15, 44793 Bochum

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