'tablature-interface
"tablature notes"
'())
+
+
+
+;; todo: figure out where to put this doco:
+
+"
+Grob properties form a name space where you can set variables per
+object. Each object however, may have multiple functions. For
+example, consider a dynamic symbol, such @code{\ff} (fortissimo). It
+is printed above or below the staff, it is a dynamic sign, and it is a
+kind of text.
+
+To reflect this different functions of a grob, procedures and variables
+are grouped into so-called interfaces. The dynamic text for example
+supports the following interfaces:
+@table @code
+@item font-interface
+ The glyph is built from characters from a font, hence the
+@code{font-interface}. For objects supporting @code{font-interface}, you
+can select alternate fonts by setting @code{font-style},
+@code{font-point-size}, etc.
+
+@item dynamic-interface
+ Dynamic interface is not associated with any variable or function in
+particular, but this makes it possible to distinguish this grob from
+other similar grobs (like @code{TextScript}), that have no meaning of
+dynamics.
+
+@item text-interface
+ This interface is for texts that are to be set using special routines
+to stack text into lines, using kerning, etc.
+
+@item general-grob-interface
+ This interface is supported by all grob types.
+@end table
+"