X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=scm%2Fgrob-description.scm;h=4e19b91a2251998ef71598b28231a8d0a526be67;hb=73e40a0dd515fd996ee0918dd96b42a754f623d5;hp=9d6f5587ad8638e3020f596bfb1996231206624d;hpb=12b33a8040a80d5b4a1217faf0d4cc7529483cc0;p=lilypond.git

diff --git a/scm/grob-description.scm b/scm/grob-description.scm
index 9d6f5587ad..4e19b91a22 100644
--- a/scm/grob-description.scm
+++ b/scm/grob-description.scm
@@ -2,31 +2,54 @@
 ;;;;
 ;;;;  source file of the GNU LilyPond music typesetter
 ;;;; 
-;;;; (c) 1998--20.301  Han-Wen Nienhuys <hanwen@cs.uu.nl>
+;;;; (c) 1998--2002  Han-Wen Nienhuys <hanwen@cs.uu.nl>
 ;;;;                 Jan Nieuwenhuizen <janneke@gnu.org>
 
 ;;;; distances are given in stafflinethickness (thicknesses) and
 ;;;; staffspace (distances)
 
 ;;;; WARNING: the meta field should be the last one.
+;;;; WARNING: don't use anonymous functions for initialization. 
 
 ;; TODO: junk the meta field in favor of something more compact?
-(define all-grob-descriptions
+(define-public all-grob-descriptions
   `(
     (Accidental
      . (
 	(molecule-callback . ,Accidental_interface::brew_molecule)
 	(font-family . music)
-	(cautionary-style . smaller)
-	(after-line-breaking-callback . ,Accidental_interface::after_line_breaking)		(meta . ((interfaces . (accidental-interface font-interface))))
+	(cautionary-style . parentheses)
+	(after-line-breaking-callback . ,Accidental_interface::after_line_breaking)		(meta . ((interfaces . (item-interface accidental-interface font-interface))))
 	))
     (AccidentalPlacement
      . (
-	(X-extent-callback . ,Accidental_placement::extent_callback)
+	(X-extent-callback . ,Axis_group_interface::group_extent_callback)
 	(left-padding . 0.3)
-	(right-padding . 0.3)
-	(meta . ((interfaces . (accidental-placement-interface))))
-	))
+
+	;; this is quite small, but it is very ugly to have
+	;; accs closer to the previous note than to the next one.
+	(right-padding . 0.15)
+	(meta . ((interfaces . (item-interface accidental-placement-interface))))
+	))
+
+    (Ambitus
+     . (
+       (breakable . #t)
+       (break-align-symbol . ambitus)
+       (molecule-callback . ,Ambitus::brew_molecule)
+       (font-family . music)
+       (note-head-style . "noteheads-2")
+       (visibility-lambda . ,begin-of-line-visible)
+       (join-heads . #t)
+       (space-alist . (
+		       (clef . (extra-space . 0.0))
+		       (key-signature . (extra-space . 0.0))
+		       (staff-bar . (extra-space . 0.0))
+		       (time-signature . (extra-space . 0.0)) 
+		       (first-note . (extra-space . 0.0))
+		       ))
+       (meta . ((interfaces . (ambitus-interface staff-symbol-referencer-interface break-aligned-interface item-interface  font-interface))))
+       ))
 
     (Arpeggio
      . (
@@ -37,7 +60,7 @@
 	(X-offset-callbacks . (,Side_position_interface::aligned_side))
 	(direction . -1)
 	(staff-position . 0.0)
-	(meta . ((interfaces . (arpeggio-interface staff-symbol-referencer-interface side-position-interface font-interface))))
+	(meta . ((interfaces . (arpeggio-interface staff-symbol-referencer-interface side-position-interface item-interface font-interface))))
 	))
 
     (BarLine
@@ -47,7 +70,7 @@
 	(break-glyph-function . ,default-break-barline)
 	(bar-size-procedure . ,Bar_line::get_staff_bar_size)
 	(molecule-callback . ,Bar_line::brew_molecule)	   
-	(visibility-lambda . ,all-visible)
+	(break-visibility . ,all-visible)
 	(breakable . #t)
 	(before-line-breaking-callback . ,Bar_line::before_line_breaking)
 	(space-alist . (
@@ -55,6 +78,7 @@
 			(custos . (minimum-space . 2.0))
 			(clef .   (minimum-space . 1.0))
 			(first-note . (extra-space . 1.3))
+			(right-edge . (extra-space . 0.0))
 			))
 
 	;;
@@ -64,7 +88,7 @@
 	(thin-kern . 3.0)
 	(hair-thickness . 1.6)
 	(thick-thickness . 6.0)
-	(meta . ((interfaces . (bar-line-interface  break-aligned-interface font-interface))))
+	(meta . ((interfaces . (bar-line-interface item-interface   break-aligned-interface font-interface))))
 	))
 
     
@@ -72,7 +96,7 @@
      . (
 	(molecule-callback . ,Text_item::brew_molecule)
 	(breakable . #t)
-	(visibility-lambda . ,begin-of-line-visible)
+	(break-visibility . ,begin-of-line-visible)
 	(padding . 1.0)
 	(direction . 1)
 	(font-family . roman)
@@ -85,7 +109,7 @@
 	      ((interfaces . (side-position-interface
 			      text-interface
 			      self-alignment-interface
-			      font-interface break-aligned-interface))))
+			      font-interface item-interface  break-aligned-interface))))
 
 	     ))
 
@@ -99,7 +123,7 @@
 	(padding . 0.1)
 	(kern . 0.2)
 	(thickness . 1.0)
-	(meta . ((interfaces . (text-interface bass-figure-interface self-alignment-interface font-interface))))
+	(meta . ((interfaces . (text-interface bass-figure-interface item-interface self-alignment-interface font-interface))))
 	))
     (Beam
      . (
@@ -112,6 +136,7 @@
 	(position-callbacks . (,Beam::least_squares
 			       ,Beam::check_concave
 			       ,Beam::slope_damping
+			       ,Beam::shift_region_to_valid
 			       ,Beam::quanting
 			      ))
 
@@ -121,15 +146,31 @@
 	(after-line-breaking-callback . ,Beam::after_line_breaking)
 	(neutral-direction . -1)
 	(dir-function . ,beam-dir-majority-median)
-	(beamed-stem-shorten . (1.0 0.5))
+	
+	;; Whe have some unreferenced problems here.
+	;;
+	;; If we shorten beamed stems less than normal stems (1 staffspace),
+	;; or high order less than 8th beams, patterns like
+	;;     c''4 [c''8 c''] c''4 [c''16 c]
+	;; are ugly (different stem lengths).
+	;;
+	;; But if we shorten 16th beams as much as 8th beams, a single
+	;; forced 16th beam looks *very* short.
+
+	;; We choose to shorten 8th beams the same as single stems,
+	;; and high order beams less than 8th beams, so that all
+	;; isolated shortened beams look nice and a bit shortened,
+	;; sadly possibly breaking patterns with high order beams.
+	(beamed-stem-shorten . (1.0 0.5 0.25))
+	
 	(outer-stem-length-limit . 0.2)
 	(slope-limit . 0.2)
-	(flag-width-function . ,default-beam-flag-width-function)
+	(flag-width-function . ,beam-flag-width-function)
 	(damping . 1)
-	(auto-knee-gap . 7)
+	(auto-knee-gap . 5.5)
 	(font-name . "cmr10")
 	(space-function . ,Beam::space_function)
-	(meta . ((interfaces . (staff-symbol-referencer-interface beam-interface))))
+	(meta . ((interfaces . (staff-symbol-referencer-interface beam-interface spanner-interface))))
 	))
 
     (BreakAlignment
@@ -138,7 +179,7 @@
 	(stacking-dir . 1)
 	(axes . (0))
 	(X-extent-callback . ,Axis_group_interface::group_extent_callback)
-	(meta . ((interfaces . (break-alignment-interface axis-group-interface)))))
+	(meta . ((interfaces . (break-alignment-interface item-interface axis-group-interface)))))
 	)
 
     (BreakAlignGroup
@@ -146,7 +187,7 @@
 	(axes  . (0))
 	(X-offset-callbacks . (,Break_align_interface::alignment_callback))
 	(X-extent-callback . ,Axis_group_interface::group_extent_callback)
-	(meta . ((interfaces . (break-aligned-interface axis-group-interface))))
+	(meta . ((interfaces . (break-aligned-interface item-interface axis-group-interface item-interface ))))
 	))
 
     (BreathingSign
@@ -154,6 +195,7 @@
 	(break-align-symbol . breathing-sign)
 	(breakable . #t)
 	(space-alist . (
+			(ambitus . (extra-space . 2.0))
 			(key-signature . (minimum-space . 1.5))
 			(staff-bar . (minimum-space . 1.5))
 			(clef . (minimum-space . 2.0))
@@ -164,8 +206,8 @@
 	(font-family . music)
 	(text . "scripts-rcomma")
 	(Y-offset-callbacks . (,Breathing_sign::offset_callback))
-	(visibility-lambda . ,begin-of-line-invisible)
-	(meta . ((interfaces . (break-aligned-interface breathing-sign-interface text-interface font-interface))))
+	(break-visibility . ,begin-of-line-invisible)
+	(meta . ((interfaces . (break-aligned-interface breathing-sign-interface text-interface font-interface item-interface ))))
 	))
 
     (Clef
@@ -175,16 +217,28 @@
 	(breakable . #t)
 	(font-family . music)	   
 	(break-align-symbol . clef)
-	(visibility-lambda . ,begin-of-line-visible)
+	(break-visibility . ,begin-of-line-visible)
 	(space-alist . (
+			(ambitus . (extra-space . 2.0))
 			(staff-bar . (minimum-space .  3.7))
 			(key-signature . (minimum-space . 4.0))
 			(time-signature . (minimum-space . 4.2))
 			(first-note . (minimum-space . 5.0))
-			(next-note . (extra-space . 0.5))			
+			(next-note . (extra-space . 0.5))
+			(right-edge . (extra-space . 0.5))
 			))
 	(Y-offset-callbacks  . (,Staff_symbol_referencer::callback)) 
-	(meta . ((interfaces . (clef-interface staff-symbol-referencer-interface font-interface break-aligned-interface))))
+	(meta . ((interfaces . (clef-interface staff-symbol-referencer-interface font-interface break-aligned-interface item-interface ))))
+	))
+
+    (Cluster
+     . (
+	(molecule-callback . ,Cluster::brew_molecule)
+	(spacing-procedure . ,Spanner::set_spacing_rods)		
+	(minimum-length . 0.0)
+	(padding . 0.25)
+	(shape . leftsided-stairs)
+	(meta . ((interfaces . (cluster-interface spanner-interface))))
 	))
 
     (ChordName
@@ -193,7 +247,7 @@
 	(after-line-breaking-callback . ,Chord_name::after_line_breaking)
 	(chord-name-function . ,default-chord-name-function)
 	(font-family . roman)
-	(meta . ((interfaces . (font-interface text-interface chord-name-interface))))
+	(meta . ((interfaces . (font-interface text-interface chord-name-interface item-interface ))))
 	))
 
     (Custos
@@ -201,17 +255,21 @@
 	(break-align-symbol . custos)
 	(breakable . #t)
 	(molecule-callback . ,Custos::brew_molecule)
-	(visibility-lambda . ,end-of-line-visible)
+	(break-visibility . ,end-of-line-visible)
 	(style . vaticana)
 	(neutral-position . 0)
 	(neutral-direction . -1)
 	(adjust-if-on-staffline . #t)
 	(Y-offset-callbacks . (,Staff_symbol_referencer::callback))
-	(font-family . music)
+	(font-family . ancient)
 	(space-alist . (
 			(first-note . (minimum-space . 0.0))
+			(right-edge . (extra-space . 0.1))
 			))
-	(meta . ((interfaces . (custos-interface staff-symbol-referencer-interface break-aligned-interface))))
+	(meta . ((interfaces
+		  . (custos-interface staff-symbol-referencer-interface
+				      font-interface
+				      break-aligned-interface item-interface ))))
 	))
 
 
@@ -221,7 +279,7 @@
 	(direction . 1)
 	(X-extent-callback . ,Axis_group_interface::group_extent_callback)
 	(X-offset-callbacks . (,Dot_column::side_position))
-	(meta . ((interfaces . (dot-column-interface axis-group-interface))))
+	(meta . ((interfaces . (dot-column-interface axis-group-interface item-interface ))))
 	))
 
     (Dots
@@ -229,7 +287,7 @@
 	(molecule-callback . ,Dots::brew_molecule)
 	(dot-count . 1)
 	(Y-offset-callbacks  . (,Dots::quantised_position_callback ,Staff_symbol_referencer::callback))
-	(meta . ((interfaces . (font-interface staff-symbol-referencer-interface dots-interface))))
+	(meta . ((interfaces . (font-interface staff-symbol-referencer-interface dots-interface item-interface ))))
 	))
 
     (DoublePercentRepeat .
@@ -241,10 +299,10 @@
 			  (width . 2.0)
 			  (thickness . 0.48)
 			  (break-align-symbol . staff-bar)
-			  (visibility-lambda . ,begin-of-line-invisible)
+			  (break-visibility . ,begin-of-line-invisible)
 			  (meta . ((interfaces . (font-interface
 						  break-aligned-interface
-						  percent-repeat-interface))))
+						  percent-repeat-interface item-interface ))))
 			 ))
 
     (DynamicText
@@ -260,50 +318,51 @@
 	(font-family . dynamic)
 	(font-shape . italic)
 	(self-alignment-Y . 0)
-	(meta . ((interfaces . (font-interface text-interface self-alignment-interface  dynamic-interface))))
+	(meta . ((interfaces . (font-interface text-interface self-alignment-interface  dynamic-interface script-interface item-interface ))))
 	))
 
     (DynamicLineSpanner
      . (
 	(axes . (1))
 	(Y-extent-callback . ,Axis_group_interface::group_extent_callback)	
-	
+	(Y-offset-callbacks . (,Side_position_interface::aligned_side))
 	(padding . 0.6)
 	(minimum-space . 1.2)
 	(direction . -1)
-	(meta . ((interfaces . (dynamic-interface axis-group-interface side-position-interface))))
+	(meta . ((interfaces . (dynamic-interface axis-group-interface side-position-interface spanner-interface))))
 	))
 
     (LeftEdge
      . (
 	(break-align-symbol . left-edge)
-	(X-offset-callbacks . (,Break_align_interface::alignment_callback))
 	(X-extent-callback . ,Grob::point_dimension_callback)
 	(breakable . #t)
 	(space-alist . (
+			(custos . (extra-space . 0.0))
+			(ambitus . (extra-space . 2.0))
 			(time-signature . (extra-space . 0.0)) 
 			(staff-bar . (extra-space . 0.0))
 			(breathing-sign . (minimum-space  . 0.0))
 			(clef . (extra-space . 1.0))
-			(first-note . (extra-space . 0.0))
+			(first-note . (extra-space . 1.0))
+			(right-edge . (extra-space . 0.0))
 			(key-signature . (extra-space . 0.0))
 			))
-	(meta . ((interfaces . (break-aligned-interface))))
+	(meta . ((interfaces . (break-aligned-interface item-interface ))))
 	))
 
     (Fingering
      . (
 	(molecule-callback . ,Text_item::brew_molecule)
-	(X-offset-callbacks . (,Self_alignment_interface::centered_on_parent
-			       ,Self_alignment_interface::aligned_on_self))
 	(padding . 0.6)
-					;		(direction . -1)
+	;;		(direction . -1)
 	(self-alignment-X . 0)
 	(self-alignment-Y . 0)
+	(script-priority . 100)
 	(font-family . number)
 	(font-relative-size . -3)
 	(font-shape . upright)
-	(meta . ((interfaces . (finger-interface font-interface text-script-interface text-interface side-position-interface self-alignment-interface))))
+	(meta . ((interfaces . (finger-interface font-interface text-script-interface text-interface side-position-interface self-alignment-interface item-interface ))))
 	))
 
 
@@ -312,7 +371,7 @@
 	(Y-offset-callbacks . (,Hara_kiri_group_spanner::force_hara_kiri_callback))
 	(Y-extent-callback . ,Hara_kiri_group_spanner::y_extent)
 	(axes . (1))
-	(meta . ((interfaces . (axis-group-interface hara-kiri-group-interface))))
+	(meta . ((interfaces . (axis-group-interface hara-kiri-group-interface item-interface  spanner-interface))))
 	))
 
     (Hairpin
@@ -329,9 +388,18 @@
 	(dash-length . 4.0)
 	(self-alignment-Y . 0)
 	(Y-offset-callbacks . (,Self_alignment_interface::aligned_on_self))
-	(meta . ((interfaces . (hairpin-interface self-alignment-interface dynamic-interface))))
+	(meta . ((interfaces . (hairpin-interface self-alignment-interface dynamic-interface spanner-interface))))
 	))
 
+    (HorizontalBracket
+     . (
+	(thickness . 1.0)
+	(molecule-callback . ,Horizontal_bracket::brew_molecule)
+	(Y-offset-callbacks . (,Side_position_interface::aligned_side))
+	(padding . 0.2)
+	(direction . -1)
+	(meta . ((interfaces . (horizontal-bracket-interface side-position-interface spanner-interface))))
+	))
     (InstrumentName
      . (
 	(breakable . #t)
@@ -346,10 +414,10 @@
 	(self-alignment-Y . 0)
 	(molecule-callback . ,Text_item::brew_molecule)		
 	(break-align-symbol . instrument-name)
-	(visibility-lambda . ,begin-of-line-visible)
+	(break-visibility . ,begin-of-line-visible)
 	(baseline-skip . 2)
 	(font-family . roman)
-	(meta . ((interfaces . (font-interface self-alignment-interface side-position-interface text-interface break-aligned-interface))))
+	(meta . ((interfaces . (font-interface self-alignment-interface side-position-interface text-interface break-aligned-interface item-interface ))))
 	))
 
     (KeySignature
@@ -358,13 +426,14 @@
 	(space-alist . (
 			(time-signature . (extra-space . 1.25))
 			(staff-bar .  (extra-space . 1.1))
+			(right-edge . (extra-space . 0.5))
 			(first-note . (extra-space . 2.5))
 			))
 	(Y-offset-callbacks . (,Staff_symbol_referencer::callback))
 	(break-align-symbol . key-signature)
-	(visibility-lambda . ,begin-of-line-visible)
+	(break-visibility . ,begin-of-line-visible)
 	(breakable . #t)
-	(meta . ((interfaces . (key-signature-interface  font-interface  break-aligned-interface))))
+	(meta . ((interfaces . (key-signature-interface  font-interface  break-aligned-interface item-interface ))))
 	))
 
     (Ligature
@@ -375,11 +444,18 @@
 
     (LigatureBracket
      . (
-	(width . 0.75)
-	(height . 0.5)
 	(ligature-primitive-callback . ,Note_head::brew_molecule)
-	(molecule-callback . ,Ligature_bracket::brew_molecule)
-	(meta . ((interfaces . (ligature-bracket-interface))))
+	(direction . 1)
+	(gap . 0.0)
+	(padding . 2.0)
+	(thickness . 1.6)
+	(edge-widen . (0.0 . 0.0))
+	(edge-height . (0.7 . 0.7))
+	(shorten-pair . (-0.2 . -0.2))
+	(before-line-breaking-callback . ,Tuplet_bracket::before_line_breaking)
+	(after-line-breaking-callback . ,Tuplet_bracket::after_line_breaking)
+	(molecule-callback . ,Tuplet_bracket::brew_molecule)
+	(meta .  ((interfaces . (tuplet-bracket-interface spanner-interface))))
 	))
 
     (LigatureHead
@@ -389,8 +465,11 @@
 	(Y-offset-callbacks  . (,Staff_symbol_referencer::callback))
 	(stem-attachment-function . ,note-head-style->attachment-coordinates)
 	(font-family . ancient)
-	(style . mensural)
-	(meta . ((interfaces . (ligature-head-interface rhythmic-head-interface note-head-interface staff-symbol-referencer-interface))))
+	(style . default)
+	(glyph-name-procedure . ,find-notehead-symbol)
+	(meta . ((interfaces . (ligature-head-interface rhythmic-head-interface
+							font-interface
+							note-head-interface staff-symbol-referencer-interface))))
 	))
 
     (LyricHyphen
@@ -401,7 +480,7 @@
 	(maximum-length .  100)
 	(molecule-callback . ,Hyphen_spanner::brew_molecule)
 	(Y-extent-callback . ,Grob::point_dimension_callback)
-	(meta . ((interfaces . (lyric-hyphen-interface))))
+	(meta . ((interfaces . (lyric-hyphen-interface spanner-interface))))
 	))
 
     (LyricExtender
@@ -410,13 +489,14 @@
 	(height . 0.8) ; stafflinethickness;
 	(right-trim-amount . 0.5)
 	(Y-extent-callback . ,Grob::point_dimension_callback)
-	(meta . ((interfaces . (lyric-extender-interface))))
+	(meta . ((interfaces . (lyric-extender-interface spanner-interface))))
 	))
 
     (LyricText
      . (
 	(molecule-callback . ,Text_item::brew_molecule)
-	(X-offset-callbacks . (,Self_alignment_interface::aligned_on_self))
+	(X-offset-callbacks . (,Self_alignment_interface::centered_on_parent
+			       ,Self_alignment_interface::aligned_on_self))
 	(self-alignment-X . 0)
 	(word-space . 0.6)
 	(ignore-length-mismatch . #f)
@@ -424,8 +504,9 @@
 	(end-alignment . 2)
 	(font-family . roman)
 	(font-shape . upright)
+	
 	;; duh, side-position-interface?
-	(meta . ((interfaces . (lyric-syllable-interface self-alignment-interface text-interface font-interface))))
+	(meta . ((interfaces . (lyric-syllable-interface self-alignment-interface text-interface font-interface item-interface ))))
 	))
 
     (MensuralLigature
@@ -435,7 +516,7 @@
 	(ligature-primitive-callback . ,Mensural_ligature::brew_ligature_primitive)
 	(molecule-callback . ,Mensural_ligature::brew_molecule)
 	(font-family . ancient)
-	(meta . ((interfaces . (mensural-ligature-interface))))
+	(meta . ((interfaces . (mensural-ligature-interface font-interface))))
 	))
 
     (Porrectus
@@ -460,11 +541,25 @@
 
 	(direction . 1)
 	(breakable . #t)
-	(visibility-lambda . ,end-of-line-invisible)
+	(font-family . roman)
+	(baseline-skip . 2)
+	(break-visibility . ,end-of-line-invisible)
 	(padding . 0.8)
-	(meta . ((interfaces . (text-interface side-position-interface font-interface mark-interface self-alignment-interface))))
+	(meta . ((interfaces . (text-interface side-position-interface font-interface mark-interface self-alignment-interface item-interface ))))
+	))
+    
+    (MeasureGrouping
+     . (
+	(Y-offset-callbacks . (,Side_position_interface::out_of_staff 
+			       ,Side_position_interface::aligned_side))
+	(molecule-callback . ,Measure_grouping::brew_molecule)
+	(padding . 2)
+	(direction . 1)
+	(thickness . 1)
+	(height . 2.0)
+	(staff-padding . 3)
+	(meta . ((interfaces . (spanner-interface side-position-interface measure-grouping-interface))))
 	))
-
     (MultiMeasureRest
      . (
 	(spacing-procedure . ,Multi_measure_rest::set_spacing_rods)
@@ -472,14 +567,26 @@
 	(Y-offset-callbacks . (,Staff_symbol_referencer::callback))
 	(staff-position . 0)
 	(expand-limit . 10)
-	(number-threshold . 1)
+	(thick-thickness . 6.6)
+	(hair-thickness . 2.0)
 	(padding . 1)
-	(thickness . 6.6)
+	(meta . ((interfaces . (multi-measure-rest-interface rest-interface font-interface staff-symbol-referencer-interface spanner-interface))))
+	))
+    
+    (MultiMeasureRestNumber
+     . (
+	(molecule-callback . ,Text_item::brew_molecule)
+	(X-offset-callbacks . (,Self_alignment_interface::aligned_on_self
+			       ,Self_alignment_interface::centered_on_other_axis_parent))
+	(Y-offset-callbacks . (,Side_position_interface::aligned_side))
+	(self-alignment-X . 0)
+	(direction . 1)
+	(padding . 2)
 	(font-family . number)
-	(padding . 1)
-	(meta . ((interfaces . (multi-measure-rest-interface rest-interface font-interface staff-symbol-referencer-interface))))
+	(meta . ((interfaces . (side-position-interface self-alignment-interface font-interface spanner-interface text-interface))))
 	))
 
+
     (NoteCollision
      . (
 	(axes . (0 1))
@@ -487,7 +594,7 @@
 	(note-width . 1.321)
 	(X-extent-callback . ,Axis_group_interface::group_extent_callback)
 	(Y-extent-callback . ,Axis_group_interface::group_extent_callback)	
-	(meta . ((interfaces . (note-collision-interface axis-group-interface))))
+	(meta . ((interfaces . (note-collision-interface axis-group-interface item-interface ))))
 	))
 
     (NoteColumn
@@ -495,38 +602,29 @@
 	(axes . (0 1))
 	(X-extent-callback . ,Axis_group_interface::group_extent_callback)
 	(Y-extent-callback . ,Axis_group_interface::group_extent_callback)	
-	(meta . ((interfaces . (axis-group-interface note-column-interface))))
+	(meta . ((interfaces . (axis-group-interface note-column-interface item-interface ))))
 	))
 
     (NoteHead
      . (
 	(style . default)
 	(molecule-callback . ,Note_head::brew_molecule)
+	(glyph-name-procedure . ,find-notehead-symbol)
 	(Y-offset-callbacks  . (,Staff_symbol_referencer::callback))
 	(stem-attachment-function . ,note-head-style->attachment-coordinates)
-	(meta . ((interfaces . (rhythmic-head-interface font-interface note-head-interface staff-symbol-referencer-interface))))
-	))
-
-    (TabNoteHead
-     . (
-	(font-family . roman)
-	(style . default)
-	(molecule-callback . ,tablature-molecule-callback)
-	(Y-offset-callbacks  . (,Staff_symbol_referencer::callback))
-	(stem-attachment-function . ,tablature-stem-attachment-function)
-  (string-tunings . (-8 -3 2 7 11 16))
-	(meta . ((interfaces . (rhythmic-head-interface font-interface note-head-interface staff-symbol-referencer-interface))))
+	(meta . ((interfaces . (rhythmic-head-interface font-interface note-head-interface staff-symbol-referencer-interface item-interface ))))
 	))
 
     (Glissando
      . (
 	(type . line)
 	(gap . 0.5)
+	(zigzag-width . 0.75)
 	(breakable . #t)
 	(X-extent-callback . #f)
 	(Y-extent-callback . #f)			 
 	(molecule-callback . ,Line_spanner::brew_molecule)
-	(meta . ((interfaces . (line-spanner-interface))))
+	(meta . ((interfaces . (line-spanner-interface spanner-interface))))
 	))
 
     (VoiceFollower
@@ -537,36 +635,39 @@
 	(X-extent-callback . #f)
 	(Y-extent-callback . #f)			 
 	(molecule-callback . ,Line_spanner::brew_molecule)
-	(meta . ((interfaces . (line-spanner-interface))))
+	(meta . ((interfaces . (line-spanner-interface spanner-interface))))
 	))
 
     (NoteName
      . (
 	(molecule-callback . ,Text_item::brew_molecule)
 	(font-family . roman)
-	(meta . ((interfaces . (note-name-interface text-interface font-interface))))
+	(meta . ((interfaces . (note-name-interface text-interface font-interface item-interface ))))
 	))
 
     (OctavateEight
      . (
 	(self-alignment-X . 0)
 	(text . "8")
-	(visibility-lambda . ,begin-of-line-visible)
+	(break-visibility . ,begin-of-line-visible)
 	(X-offset-callbacks . (,Self_alignment_interface::centered_on_parent ,Self_alignment_interface::aligned_on_self))
 	(Y-offset-callbacks . (,Side_position_interface::aligned_side))
 	(molecule-callback . ,Text_item::brew_molecule)
 	(font-shape . italic)
+	(padding . 0.4)
+	(font-relative-size . -2)
 	(font-family . roman)
-	(meta . ((interfaces . (text-interface self-alignment-interface side-position-interface font-interface))))
+	(meta . ((interfaces . (text-interface self-alignment-interface side-position-interface font-interface item-interface ))))
 	))
 
     (PaperColumn
      . (
 	(axes . (0))
+	(before-line-breaking-callback . ,Paper_column::before_line_breaking)
 	(X-extent-callback . ,Axis_group_interface::group_extent_callback)
 
 ;	        (molecule-callback . ,Paper_column::brew_molecule) (font-name . "cmr8") (Y-extent-callback . #f)
-	(meta . ((interfaces . (paper-column-interface axis-group-interface spaceable-grob-interface))))
+	(meta . ((interfaces . (paper-column-interface axis-group-interface spaceable-grob-interface item-interface ))))
 	))
 
     (PhrasingSlur
@@ -580,28 +681,30 @@
 	(extremity-offset-alist . ,default-phrasing-slur-extremity-offset-alist)
 	(de-uglify-parameters . (1.5  0.8  -2.0))
 	(Y-extent-callback . ,Slur::height)
-	(details . ((height-limit . 2.0) (ratio . 0.333) (force-blowfit . 0.5)
-		    (bezier-pct-c0 . -0.2) (bezier-pct-c3 . 0.000006)
-		    (bezier-pct-out-max . 0.8) (bezier-pct-in-max . 1.2)
-		    (bezier-area-steps . 1.0)))
+	(height-limit . 2.0)
+	(ratio . 0.333)
 	(beautiful . 0.5)
 	(y-free . 0.75)
 	(attachment . (#f . #f))
 	(attachment-offset . ((0 . 0) . (0 . 0)))
 	(slope-limit . 0.8)
-	(meta . ((interfaces . (slur-interface))))
+	(details . ((force-blowfit . 0.5)
+		    (bezier-pct-c0 . -0.2) (bezier-pct-c3 . 0.000006)
+		    (bezier-pct-out-max . 0.8) (bezier-pct-in-max . 1.2)
+		    (bezier-area-steps . 1.0)))
+	(meta . ((interfaces . (slur-interface spanner-interface))))
 	))
 
     (NonMusicalPaperColumn
      . (
 	(axes . (0))
 	(X-extent-callback . ,Axis_group_interface::group_extent_callback)
-
+	(before-line-breaking-callback . ,Paper_column::before_line_breaking)
 	;; debugging stuff: print column number.
 ;	(molecule-callback . ,Paper_column::brew_molecule) (font-name . "cmr8")	(Y-extent-callback . #f)
 
 
-	(meta .  ((interfaces . (paper-column-interface axis-group-interface spaceable-grob-interface))))
+	(meta .  ((interfaces . (paper-column-interface axis-group-interface spaceable-grob-interface item-interface ))))
 	))
 
     (PercentRepeat
@@ -612,7 +715,7 @@
 	(thickness . 0.48)
 	(minimum-width . 12.5) ; staffspace
 	(font-family . music)
-	(meta . ((interfaces . (multi-measure-rest-interface  font-interface percent-repeat-interface))))
+	(meta . ((interfaces . (multi-measure-rest-interface  spanner-interface font-interface percent-repeat-interface))))
 	))
 
     (PianoPedalBracket   ;; an example of a text spanner
@@ -624,11 +727,11 @@
 	(width-correct . 0)
 	(outer . #t)
 	(direction . -1)
-	(edge-width . (0.5 . 0.5))
+	(edge-widen . (0.5 . 0.5))
 	(edge-height . (1.0 . 1.0))
 	(shorten-pair . (0.0 . 0.0))
 	(thickness .  1.0)
-	(meta . ((interfaces . (text-spanner-interface piano-pedal-interface))))
+	(meta . ((interfaces . (text-spanner-interface piano-pedal-interface spanner-interface))))
 	))
 
     (RepeatSlash
@@ -636,7 +739,7 @@
 	(molecule-callback . , Percent_repeat_item_interface::beat_slash)
 	(thickness . 0.48)
 	(slope . 1.7)
-	(meta . ((interfaces . (percent-repeat-interface))))
+	(meta . ((interfaces . (percent-repeat-interface item-interface ))))
 	))
     (Rest
      . (
@@ -645,18 +748,18 @@
 	(Y-extent-callback . ,Rest::extent_callback)		
 	(molecule-callback . ,Rest::brew_molecule)
 	(Y-offset-callbacks . (,Staff_symbol_referencer::callback)) 
-	(minimum-beam-collision-distance . 1.5)
+	(minimum-beam-collision-distance . 0.75)
 	(meta . (
 		 (interfaces . (font-interface
 				rhythmic-head-interface
 				staff-symbol-referencer-interface
-				rest-interface))
+				rest-interface item-interface ))
 		))))
 
     (RestCollision
      . (
 	(minimum-distance . 0.75)
-	(meta . ((interfaces . (rest-collision-interface))))
+	(meta . ((interfaces . (rest-collision-interface item-interface ))))
 	))
 
     (Script
@@ -666,17 +769,18 @@
 
 	;; This value is sensitive: if too large, staccato dots will move a
 	;; space a away.
-	(padding . 0.25) 
+	(padding . 0.25)
+	;; (script-priority . 0) priorities for scripts, see script.scm
 	(X-offset-callbacks . (,Self_alignment_interface::centered_on_parent))
 	(before-line-breaking-callback . ,Script_interface::before_line_breaking)
 	(font-family . music)
-	(meta . ((interfaces . (script-interface side-position-interface font-interface))))
+	(meta . ((interfaces . (script-interface side-position-interface font-interface item-interface ))))
 	))
 
     (ScriptColumn
      . (
 	(before-line-breaking-callback . ,Script_column::before_line_breaking)
-	(meta . ((interfaces . (script-column-interface))))
+	(meta . ((interfaces . (script-column-interface item-interface ))))
 	))
 
     (Slur
@@ -690,16 +794,18 @@
 	(extremity-offset-alist . ,default-slur-extremity-offset-alist)
 	(de-uglify-parameters . (1.5  0.8  -2.0))
 	(Y-extent-callback . ,Slur::height)
-	(details . ((height-limit . 2.0) (ratio . 0.333) (force-blowfit . 0.5)
-		    (bezier-pct-c0 . -0.2) (bezier-pct-c3 . 0.000006)
-		    (bezier-pct-out-max . 0.8) (bezier-pct-in-max . 1.2)
-		    (bezier-area-steps . 1.0)))
+	(height-limit . 2.0)
+	(ratio . 0.333)
 	(beautiful . 0.5)
 	(y-free . 0.75)
 	(attachment . (#f . #f))
 	(attachment-offset . ((0 . 0) . (0 . 0)))
 	(slope-limit . 0.8)
-	(meta . ((interfaces . (slur-interface))))
+	(details . ((force-blowfit . 0.5)
+		    (bezier-pct-c0 . -0.2) (bezier-pct-c3 . 0.000006)
+		    (bezier-pct-out-max . 0.8) (bezier-pct-in-max . 1.2)
+		    (bezier-area-steps . 1.0)))
+	(meta . ((interfaces . (slur-interface spanner-interface))))
 	))
 
     (SpacingSpanner
@@ -708,7 +814,8 @@
 	(grace-space-factor . 0.6)
 	(shortest-duration-space . 2.0)
 	(spacing-increment . 1.2)
-	(meta . ((interfaces . (spacing-spanner-interface))))
+	(base-shortest-duration . ,(ly:make-moment 1 8))
+	(meta . ((interfaces . (spacing-interface spacing-spanner-interface spanner-interface))))
 	))
 
     (SpanBar
@@ -716,7 +823,7 @@
 	(break-align-symbol . staff-bar)
 	(bar-size-procedure . ,Span_bar::get_bar_size) 
 	(molecule-callback . ,Span_bar::brew_molecule)
-	(visibility-lambda . ,begin-of-line-invisible)
+	(break-visibility . ,begin-of-line-invisible)
 	(X-extent-callback . ,Span_bar::width_callback)
 	(Y-extent-callback . ())
 	(breakable . #t)
@@ -731,7 +838,8 @@
 	(thin-kern . 3.0)
 	(hair-thickness . 1.6)
 	(thick-thickness . 6.0)
-	(meta . ((interfaces . (span-bar-interface bar-line-interface))))
+	(meta . ((interfaces . (span-bar-interface font-interface
+						   bar-line-interface item-interface ))))
 	))
 
     (StanzaNumber
@@ -739,30 +847,31 @@
 	(breakable . #t)
 	(molecule-callback . ,Text_item::brew_molecule)		
 	(break-align-symbol . clef)
-	(visibility-lambda . ,begin-of-line-visible)
+	(break-visibility . ,begin-of-line-visible)
 	(font-family . roman)
-	(meta . ((interfaces . (break-aligned-interface text-interface font-interface))))		
+	(meta . ((interfaces . (break-aligned-interface text-interface font-interface item-interface ))))		
 	))
 
     (StaffSpacing
      . (
 	(breakable . #t)
 	(stem-spacing-correction . 0.4)
-	(meta . ((interfaces . (staff-spacing-interface))))
+	(knee-spacing-correction . 0.75)
+	(meta . ((interfaces . (spacing-interface staff-spacing-interface item-interface ))))
 	))
     (NoteSpacing
      . (
 	(stem-spacing-correction . 0.5)
-	(meta . ((interfaces . (note-spacing-interface))))
+	(knee-spacing-correction . 0.75)
+	(meta . ((interfaces . (spacing-interface note-spacing-interface item-interface ))))
 	))
 
     (StaffSymbol
      . (
 	(molecule-callback . ,Staff_symbol::brew_molecule)
 	(line-count . 5)
-	(ragged-right . #f)
 	(layer . 0)
-	(meta . ((interfaces . (staff-symbol-interface))))
+	(meta . ((interfaces . (staff-symbol-interface spanner-interface))))
 	))
 
     (SostenutoPedal
@@ -776,18 +885,20 @@
 	(font-family . roman)
 	(font-shape . italic)
 	(self-alignment-X . 0)
-	(meta . ((interfaces . (text-interface  self-alignment-interface font-interface))))
+	(meta . ((interfaces . (text-interface  self-alignment-interface font-interface item-interface))))
 	))
 
     (SostenutoPedalLineSpanner 
      . (
 	(axes . (1))
 	(Y-extent-callback . ,Axis_group_interface::group_extent_callback)	
+	(Y-offset-callbacks . (,Side_position_interface::aligned_side))
+	
 
 	(padding . 1.2)
 	(minimum-space . 1.0)
 	(direction . -1)
-	(meta . ((interfaces . (piano-pedal-interface axis-group-interface side-position-interface))))
+	(meta . ((interfaces . (piano-pedal-interface axis-group-interface side-position-interface  spanner-interface))))
 	))
 	
     (Stem
@@ -795,17 +906,49 @@
 	(before-line-breaking-callback . ,Stem::before_line_breaking)
 	(molecule-callback . ,Stem::brew_molecule)
 	(thickness . 1.3)
-	(beamed-lengths . (0.0 2.5 2.0 1.5))
-	(beamed-minimum-lengths . (0.0 1.5 1.25 1.0))
-
-	;;  Stems in unnatural (forced) direction should be shortened,
-	;;  according to [Roush & Gourlay].  Their suggestion to knock off
-	;;  a whole staffspace seems a bit drastical: we'll do half.
 
+	;; 3.5 (or 3 measured from note head) is standar length
+	;; 32nd, 64th flagged stems should be longer
 	(lengths . (3.5 3.5 3.5 4.5 5.0))
+	
+	;; Stems in unnatural (forced) direction should be shortened by
+	;; one staff space, according to [Roush & Gourlay].
+	;; Flagged stems we shorten only half a staff space.
 	(stem-shorten . (1.0 0.5))
-					; if stem is on middle line, choose this direction.
+
+	;; default stem direction for note on middle line
 	(neutral-direction . -1)
+	
+	;; [Wanske]: standard length (but no shorter than minimum).
+	;; (beamed-lengths . (3.5))
+	
+	;; FIXME.  3.5 yields too long beams (according to Ross and
+	;; looking at Baerenreiter examples) for a number of common
+	;; boundary cases.  Subtracting half a beam thickness fixes
+	;; this, but the bug may well be somewhere else.
+	(beamed-lengths . (3.26))
+
+	;; [Wanske] lists three sets of minimum lengths.  One
+	;; set for the nomal case, and one set for beams with `der
+	;; Balkenendpunkt weiter "uber bzw. unter die Systemgrenze
+	;; hinaus (bei Gruppen mit grossem Tonumfang)' and the extreme
+	;; case.
+
+	;; Note that Wanske lists numbers lengths starting from top of
+	;; head, so we must add half a staff space.
+	
+	;; We use the normal minima as minimum for the ideal lengths,
+	;; and the extreme minima as abolute minimum length.
+	
+	;; The 'normal' minima
+	(beamed-minimum-free-lengths . (2.5 2.0 1.5))
+	
+	;; The 'far outside staff' minima, not used
+	;(beamed-far-minimum-free-lengths . (1.83))
+	
+	;; The 'extreme case' minima
+	(beamed-extreme-minimum-free-lengths . (1.83 1.5))
+
 	(X-offset-callbacks . (,Stem::off_callback))
 	(X-extent-callback . ,Stem::dim_callback)	
 	(Y-extent-callback . ,Stem::height)
@@ -813,7 +956,8 @@
 	(adjust-if-on-staffline . #t)
 	(font-family . music)	   
 	(avoid-note-head . #f)
-	(meta . ((interfaces . (stem-interface  font-interface))))
+	(up-to-staff . #f)
+	(meta . ((interfaces . (stem-interface  font-interface item-interface ))))
 	))
 
     (StemTremolo
@@ -822,20 +966,20 @@
 	(Y-extent-callback . ,Stem_tremolo::height)
 	(X-extent-callback . #f)
 
-	(beam-width . 2.0) ; staff-space
+	(beam-width . 1.6) ; staff-space
 	(beam-thickness . 0.48) ; staff-space
-	(meta . ((interfaces . (stem-tremolo-interface))))
+	(meta . ((interfaces . (stem-tremolo-interface item-interface ))))
 	))
 
     (SeparationItem
      . (
-	(meta . ((interfaces . (separation-item-interface))))
+	(meta . ((interfaces . (spacing-interface separation-item-interface item-interface ))))
 	))
 
     (SeparatingGroupSpanner
      . (
 	(spacing-procedure . ,Separating_group_spanner::set_spacing_rods)
-	(meta . ((interfaces . (separation-spanner-interface))))
+	(meta . ((interfaces . (spacing-interface separation-spanner-interface spanner-interface))))
 	))
 
     (SustainPedal
@@ -847,18 +991,19 @@
 	(padding . 0.0)  ;; padding relative to SustainPedalLineSpanner
 	(pedal-type . text)
 	(X-offset-callbacks . (,Self_alignment_interface::aligned_on_self))
-	(meta . ((interfaces . (piano-pedal-interface text-spanner-interface text-interface self-alignment-interface font-interface))))
+	(meta . ((interfaces . (piano-pedal-interface text-spanner-interface text-interface self-alignment-interface font-interface item-interface))))
 	))
 
     (SustainPedalLineSpanner 
      . (
 	(axes . (1))
-	(Y-extent-callback . ,Axis_group_interface::group_extent_callback)	
+	(Y-extent-callback . ,Axis_group_interface::group_extent_callback)
+	(Y-offset-callbacks . (,Side_position_interface::aligned_side))
 	
 	(padding . 1.2)
 	(minimum-space . 1.0)
 	(direction . -1)
-	(meta . ((interfaces . (piano-pedal-interface axis-group-interface side-position-interface))))
+	(meta . ((interfaces . (piano-pedal-interface axis-group-interface side-position-interface spanner-interface))))
 	))
 
     (System
@@ -866,7 +1011,7 @@
 	(axes . (0 1))
 	(X-extent-callback . ,Axis_group_interface::group_extent_callback)
 	(Y-extent-callback . ,Axis_group_interface::group_extent_callback)	
-	(meta . ((interfaces . (system-interface axis-group-interface))))
+	(meta . ((interfaces . (system-interface axis-group-interface spanner-interface))))
 	))
 
     (SystemStartBrace
@@ -890,7 +1035,7 @@
 	(arch-width . 1.5)
 	(bracket-collapse-height . 1)
 	(thickness . 0.25)
-	(meta . ((interfaces . (system-start-delimiter-interface))))
+	(meta . ((interfaces . (system-start-delimiter-interface spanner-interface))))
 	))
 
     (SystemStartBar
@@ -900,19 +1045,21 @@
 	(glyph . "bar-line")
 	(thickness . 1.6)
 	(after-line-breaking-callback . ,System_start_delimiter::after_line_breaking)
-	(meta . ((interfaces . (system-start-delimiter-interface))))
+	(meta . ((interfaces . (system-start-delimiter-interface spanner-interface))))
 	))
 
     (TextScript
      . (
 	(molecule-callback . ,Text_item::brew_molecule)
 	(no-spacing-rods . #t)
+	(X-offset-callbacks . (,Self_alignment_interface::aligned_on_self))
 	(direction . -1)
 	(padding . 0.5)
+	(script-priority . 200)
 	;; todo: add X self alignment?
 	(baseline-skip . 2)
 	(font-family . roman)
-	(meta . ((interfaces . (text-script-interface text-interface side-position-interface font-interface))))
+	(meta . ((interfaces . (text-script-interface text-interface side-position-interface font-interface item-interface ))))
 	))
 
     (TextSpanner
@@ -926,9 +1073,25 @@
 	(width-correct . -1)
 
 	(direction . 1)
-	(meta . ((interfaces . (text-spanner-interface  font-interface))))		
+	(meta . ((interfaces . (text-spanner-interface side-position-interface font-interface spanner-interface))))		
+	))
+    
+    (TabNoteHead
+     . (
+	(font-family . roman)
+	(style . default)
+	(molecule-callback . ,tablature-molecule-callback)
+	(Y-offset-callbacks  . (,Staff_symbol_referencer::callback))
+	(extra-offset . (0 . -0.65)) ;; UGH! TODO: Clean this up!
+	(stem-attachment-function . ,tablature-stem-attachment-function)
+	(meta . ((interfaces
+		  . (rhythmic-head-interface
+		     font-interface
+		     note-head-interface staff-symbol-referencer-interface
+		     text-interface item-interface ))))
 	))
 
+
     (Tie
      . (
 	(molecule-callback . ,Tie::brew_molecule)
@@ -936,10 +1099,10 @@
 	(staffline-clearance . 0.35)
 	(details . ((ratio . 0.333) (height-limit . 1.0)))
 	(thickness . 1.2)
-	(x-gap . 0.2)
+	(x-gap . -0.1)
 	(y-offset . 0.6)
 	(minimum-length  . 2.5)
-	(meta . ((interfaces . (tie-interface))))
+	(meta . ((interfaces . (tie-interface spanner-interface))))
 	))
 
     (TieColumn
@@ -947,22 +1110,23 @@
 	(after-line-breaking-callback . ,Tie_column::after_line_breaking)
 	(X-extent-callback . ())
 	(Yoo-extent-callback . ())	
-	(meta . ((interfaces . (tie-column-interface))))
+	(meta . ((interfaces . (tie-column-interface spanner-interface))))
 	))
 
     (TimeSignature
      . (
 	(molecule-callback . ,Time_signature::brew_molecule)
 	(break-align-symbol . time-signature)
-	(visibility-lambda . ,all-visible)
+	(break-visibility . ,all-visible)
 	(space-alist . (
 			(first-note . (extra-space . 2.0))
+			(right-edge . (extra-space . 0.5))
 			(staff-bar .  (minimum-space . 2.0))
 			))
 	(breakable . #t)
 	(style . C)
 	(font-family . number)
-	(meta . ((interfaces . (time-signature-interface break-aligned-interface font-interface))))
+	(meta . ((interfaces . (time-signature-interface break-aligned-interface font-interface item-interface ))))
 	))
 
     (TupletBracket
@@ -970,9 +1134,9 @@
 	(gap . 2.0)
 	(padding . 0.9)
 	(thickness . 1.6)
-	(edge-width . (0.0 . 0.0))
+	(edge-widen . (0.0 . 0.0))
 	(edge-height . (0.7 . 0.7))
-	(shorten-pair . (0.0 . 0.0))
+	(shorten-pair . (-0.2 . -0.2))
 	(before-line-breaking-callback . ,Tuplet_bracket::before_line_breaking)
 	(after-line-breaking-callback . ,Tuplet_bracket::after_line_breaking)
 	(molecule-callback . ,Tuplet_bracket::brew_molecule)
@@ -980,7 +1144,7 @@
 	(font-shape . italic)
 
 	(font-relative-size . -1)
-	(meta .  ((interfaces . (text-interface tuplet-bracket-interface font-interface))))
+	(meta .  ((interfaces . (text-interface tuplet-bracket-interface font-interface spanner-interface))))
 	))
 
     (UnaCordaPedal
@@ -994,17 +1158,19 @@
 	(pedal-type . text)
 	(padding . 0.0)  ;; padding relative to UnaCordaPedalLineSpanner
 	(X-offset-callbacks . (,Self_alignment_interface::aligned_on_self))
-	(meta . ((interfaces . (text-interface self-alignment-interface font-interface))))
+	(meta . ((interfaces . (text-interface self-alignment-interface font-interface item-interface ))))
 	))
 
     (UnaCordaPedalLineSpanner 
      . (
 	(axes . (1))
 	(Y-extent-callback . ,Axis_group_interface::group_extent_callback)	
+	(Y-offset-callbacks . (,Side_position_interface::aligned_side))
+	
 	(padding . 1.2)
 	(minimum-space . 1.0)
 	(direction . -1)
-	(meta . ((interfaces . (piano-pedal-interface axis-group-interface side-position-interface))))
+	(meta . ((interfaces . (piano-pedal-interface axis-group-interface side-position-interface spanner-interface))))
 	))
 
     (VoltaBracket
@@ -1019,7 +1185,7 @@
 	(minimum-space . 5)
 	(font-family . number)
 	(font-relative-size . -2)
-	(meta . ((interfaces . (volta-bracket-interface text-interface side-position-interface font-interface))))
+	(meta . ((interfaces . (volta-bracket-interface text-interface side-position-interface font-interface spanner-interface))))
 	))
     
     (VerticalAlignment
@@ -1027,7 +1193,7 @@
 	(axes . (1))
 	(Y-extent-callback . ,Axis_group_interface::group_extent_callback)
 	(stacking-dir . -1)
-	(meta . ((interfaces . (align-interface axis-group-interface))))
+	(meta . ((interfaces . (align-interface axis-group-interface spanner-interface))))
 	))
 
     (VerticalAxisGroup
@@ -1035,7 +1201,7 @@
 	(axes . (1))
 	(Y-extent-callback . ,Axis_group_interface::group_extent_callback)	
 	
-	(meta . ((interfaces . (axis-group-interface))))
+	(meta . ((interfaces . (axis-group-interface spanner-interface))))
 	))
    )
  )
@@ -1046,7 +1212,6 @@
 (define (completize-grob-entry x)
   "transplant assoc key into 'name entry of 'meta of X
 "
-
   (let* ((name-sym  (car x))
 	 (grob-entry (cdr x))
 	 (metaentry (cdr (assoc 'meta grob-entry)))
@@ -1072,6 +1237,9 @@
 (map (lambda (x)
 					; (display (car x)) (newline)
 
-       (set-object-property! (car x) 'translation-type? list?))
+       (set-object-property! (car x) 'translation-type? list?)
+       (set-object-property! (car x) 'is-grob? #t))
      all-grob-descriptions)
 
+
+(set! all-grob-descriptions (sort all-grob-descriptions alist<?))