Reduce space requirements by squashing opcode + flags + value into 32 bits.

This has been achieved by reducing opcode's width from 16 to 8 bits. This is fine as there's 172 opcodes still available at present so plenty of room for expansion. Flags have been reduced from 16 to 10 bits wide and currently have 8 bits unused. This leaves 14 bits available for the opcode-specific value. No opcode needs all 14 bits at present.
Inherit is now a global flag rather than a pre-defined value. This saves looking at the value field at all when styles are inherited and generally reduces complexity.

svn path=/trunk/libcss/; revision=5616

1 files changed, 431 insertions, 545 deletions

diff --git a/docs/Bytecode b/docs/Bytecode
index f09ad41..5c88fec 100644
--- a/docs/Bytecode
+++ b/docs/Bytecode
@@ -4,14 +4,19 @@ CSS style declaration bytecode
 Format
 ------
 
-<opcode+flags> [<parameters>]
+<opcode+flags+value> [<parameters>]
 
-<opcode+flags> is 32 bits wide. 
-The bottom 16 bits contain the opcode and the top 16 bits contain flags. 
+<opcode+flags+value> is 32 bits wide:
+	bits 18-13: value
+	bits 8-17 : flags
+	bits 0-7  : opcode
 
-The 16 bits of flag data are defined as follows:
-	bit 0   : !important
-	bit 1-15: MBZ
+The 10 bits of flag data are defined as follows:
+	bits 2-9: MBZ
+	bit 1   : value is inherit
+	bit 0   : value is important
+
+The 14 bits of value are opcode-specific.
 
 Parameters are opcode-specific. Each parameter must begin on a 4 byte boundary.
 
@@ -20,9 +25,12 @@ Datatype storage
 
 8 and 16 bit integers are stored as 32bit values.
 
-32 and 64 bit integers are stored in their natural format.
+32 bit integers are stored in their natural format.
+
+Floats are stored in their natural format.
 
-Floats and doubles are stored in their natural format.
+Integers wider than 32 bits are not supported.
+Doubles are not supported.
 
 Strings are stored unterminated UTF8, preceded by 32bits of byte length, and 
 followed by 0-3 bytes of padding for alignment. The padding bytes must be 
@@ -89,12 +97,10 @@ Opcodes
 -------
 
 00 - azimuth
-	<value> (32bits) :
-		bits 8-31: MBZ
-		bit 7 set => angle or inherit:
-			bits 0-6: 0000000 => signed angle unit follows,
-				  1111111 => inherit,
-				  other   => Reserved for future expansion.
+	<value> (14bits) :
+		bits 8-13: MBZ
+		bit 7 set => angle follows.
+			bits 0-6: MBZ
 		bit 6 set => relative movement:
 			bit 7   : MBZ
 			bits 1-5: MBZ
@@ -114,83 +120,73 @@ Opcodes
 				other => Reserved for future expansion.
 
 01 - background-attachment
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => fixed
 		1     => scroll
-		0xff  => inherit
 		other => Reserved for future expansion.
 
 02 - background-color
-	<value> (32bits) :
-		bit 8-31: MBZ
-		bit 7 set => color or inherit:
-			bits 0-6: 0000000 => colour follows,
-				  1111111 => inherit,
-			          other   => Reserved for future expansion.
-		bit 7 clear => keyword color:
+	<value> (14bits) :
+		bit 8-13: MBZ
+		bit 7 set => colour follows.
+			bits 0-6: MBZ
+		bit 7 clear => keyword colour:
 			bits 1-6: MBZ
 			bit 0   : clear => transparent, set => rffe.
 
 03 - background-image
-	<value> (32bits) :
-		bits 8-31: MBZ
-		bit 7 set => uri or inherit:
-			bits 0-6: 0000000 => uri string follows,
-				  1111111 => inherit,
-				  other   => Reserved for future expansion.
+	<value> (14bits) :
+		bits 8-13: MBZ
+		bit 7 set => uri string follows.
+			bits 0-6: MBZ
 		bit 7 clear => keyword:
 			bits 1-6: MBZ
 			bit 0   : clear => none, set => rffe.
 
 04 - background-position
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 : 
-			11111111 => inherit
-			otherwise:
-				bit 7: set => percentage or length unit follows
-						bits 4-6: MBZ
-				       clear => keywords:
-						bits 4-6:
-							000   => right
-							001   => center
-							010   => left
-							other => rffe
-				bit 3: set => percentage or length unit follows
-						bits 0-2: MBZ
-				       clear => keywords:
-						bits 0-2:
-							000   => bottom
-							001   => center
-							010   => top
-							other => rffe
+			bit 7: set => percentage or length unit follows
+					bits 4-6: MBZ
+			       clear => keywords:
+					bits 4-6:
+						000   => right
+						001   => center
+						010   => left
+						other => rffe
+			bit 3: set => percentage or length unit follows
+					bits 0-2: MBZ
+			       clear => keywords:
+					bits 0-2:
+						000   => bottom
+						001   => center
+						010   => top
+						other => rffe
 
 05 - background-repeat
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => no-repeat
 		1     => repeat-x
 		2     => repeat-y
 		3     => repeat
-		0xff  => inherit
 		other => Reserved for future expansion.
 
 06 - border-collapse
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => separate
 		1     => collapse
-		0xff  => inherit
 		other => Reserved for future expansion.
 
 07 - border-spacing
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 : 00000000 => two lengths follow,
-			   11111111 => inherit,
 			   other    => Reserved for future expansion.	
 
 08 - border-{top,right,bottom,left}-color
-	<value> (32bits) :
-		bits 10-31: MBZ
+	<value> (14bits) :
+		bits 10-13: MBZ
 		bits 8-9  :
 			00 => top
 			01 => right
@@ -198,12 +194,11 @@ Opcodes
 			11 => left
 		bits 0-7  : 00000000 => colour follows,
 			    00000001 => transparent,
-			    11111111 => inherit,
 			    other    => Reserved for future expansion.
 
 09 - border-{top,right,bottom,left}-style
-	<value> (32bits) :
-		bits 10-31: MBZ
+	<value> (14bits) :
+		bits 10-13: MBZ
 		bits 8-9 :
 			00 => top
 			01 => right
@@ -220,96 +215,84 @@ Opcodes
 			00000111 => ridge,
 			00001000 => inset,
 			00001001 => outset,
-			11111111 => inherit,
 			other    => Reserved for future expansion.
 
 0a - border-{top,right,bottom,left}-width
-	<value> (32bits) :
-		bits 10-31: MBZ
+	<value> (14bits) :
+		bits 10-13: MBZ
 		bits 8-9 :
 			00 => top
 			01 => right
 			10 => bottom
 			11 => left
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => length follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => thin,
-						  0000001 => medium,
-						  0000010 => thick,
-						  other   => rffe.
+			bit 7 set => length follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => thin,
+					  0000001 => medium,
+					  0000010 => thick,
+					  other   => rffe.
 
 0b - bottom
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7: 
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => length/percentage follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => auto,
-						  other   => rffe.
+			bit 7 set => length/percentage follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => auto,
+					  other   => rffe.
 
 0c - caption-side
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => top
 		1     => bottom
-		0xff  => inherit
 		other => Reserved for future expansion.
 
 0d - clear
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => none
 		1     => left
 		2     => right
 		3     => both
-		0xff  => inherit
 		other => Reserved for future expansion.
 
 0e - clip
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7: 
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => shape follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => auto,
-						  other   => rffe.
+			bit 7 set => shape follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => auto,
+					  other   => rffe.
 
 0f - color
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7: 
-			11111111 => inherit,
 			00000000 => colour follows,
 			other    => Reserved for future expansion.
 
 10 - content
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => string follows
-					bits 0-6: 0000000 => string,
-						  0000001 => uri,
-						  0000010 => counter,
-						  0000011 => attr,
-						  other   => rffe.
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => normal,
-						  0000001 => none,
-						  0000010 => open-quote,
-						  0000011 => close-quote,
-						  0000100 => no-open-quote,
-						  0000101 => no-close-quote,
-						  other   => rffe.
+			bit 7 set => string follows
+				bits 0-6: 0000000 => string,
+					  0000001 => uri,
+					  0000010 => counter,
+					  0000011 => attr,
+					  other   => rffe.
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => normal,
+					  0000001 => none,
+					  0000010 => open-quote,
+					  0000011 => close-quote,
+					  0000100 => no-open-quote,
+					  0000101 => no-close-quote,
+					  other   => rffe.
 
 	If the value is not "normal", "none", or "inherit", then there is
 	a parameter list. Each item is preceded by a <value> word which
@@ -317,18 +300,16 @@ Opcodes
 	word with all bits set to zero (the encoding for "normal").
 
 11 - counter-increment
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => string or integer follows
-					bits 0-6: 0000000 => string,
-						  0000001 => integer,
-						  other   => rffe.
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => none,
-						  other   => rffe.
+			bit 7 set => string or integer follows
+				bits 0-6: 0000000 => string,
+					  0000001 => integer,
+					  other   => rffe.
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => none,
+					  other   => rffe.
 
 	If the value is not "none", or "inherit", then there is a parameter 
 	list. Each item is preceded by a <value> word which declares the type 
@@ -336,18 +317,16 @@ Opcodes
 	zero (the encoding for "none").
 
 12 - counter-reset
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => string or integer follows
-					bits 0-6: 0000000 => string,
-						  0000001 => integer,
-						  other   => rffe.
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => none,
-						  other   => rffe.
+			bit 7 set => string or integer follows
+				bits 0-6: 0000000 => string,
+					  0000001 => integer,
+					  other   => rffe.
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => none,
+					  other   => rffe.
 
 	If the value is not "none", or "inherit", then there is a parameter 
 	list. Each item is preceded by a <value> word which declares the type 
@@ -355,56 +334,50 @@ Opcodes
 	zero (the encoding for "none").
 
 13 - cue-after
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => uri follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => none,
-						  other   => rffe.
+			bit 7 set => uri follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => none,
+					  other   => rffe.
 
 14 - cue-before
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => uri follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => none,
-						  other   => rffe.
+			bit 7 set => uri follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => none,
+					  other   => rffe.
 
 15 - cursor
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => uri follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => auto,
-						  0000001 => crosshair,
-						  0000010 => default,
-						  0000011 => pointer,
-						  0000100 => move,
-						  0000101 => e-resize,
-						  0000110 => ne-resize,
-						  0000111 => nw-resize,
-						  0001000 => n-resize,
-						  0001001 => se-resize,
-						  0001010 => sw-resize,
-						  0001011 => s-resize,
-						  0001100 => w-resize,
-						  0001101 => text,
-						  0001110 => wait,
-						  0001111 => help,
-						  0010000 => progress,
-						  other   => rffe.
+			bit 7 set => uri follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => auto,
+					  0000001 => crosshair,
+					  0000010 => default,
+					  0000011 => pointer,
+					  0000100 => move,
+					  0000101 => e-resize,
+					  0000110 => ne-resize,
+					  0000111 => nw-resize,
+					  0001000 => n-resize,
+					  0001001 => se-resize,
+					  0001010 => sw-resize,
+					  0001011 => s-resize,
+					  0001100 => w-resize,
+					  0001101 => text,
+					  0001110 => wait,
+					  0001111 => help,
+					  0010000 => progress,
+					  other   => rffe.
 
 	If the value indicates that a uri is present, then there is a 
 	parameter list. Each item is preceded by a <value> word which declares
@@ -412,14 +385,13 @@ Opcodes
 	bit 7 clear.
 
 16 - direction
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => ltr,
 		1     => rtl,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 17 - display
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => inline,
 		1     => block,
 		2     => list-item,
@@ -436,56 +408,49 @@ Opcodes
 		d     => table-cell,
 		e     => table-caption,
 		f     => none,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 18 - elevation
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => angle follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => below,
-						  0000001 => level,
-						  0000010 => above,
-						  0000011 => higher,
-						  0000100 => lower,
-						  other   => rffe.
+			bit 7 set => angle follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => below,
+					  0000001 => level,
+					  0000010 => above,
+					  0000011 => higher,
+					  0000100 => lower,
+					  other   => rffe.
 
 19 - empty-cells
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => show,
 		1     => hide,
-		0xff  => inherit
 		other => Reserved for future expansion.
 
 1a - float
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => left,
 		1     => right,
 		2     => none,
-		0xff  => inherit
 		other => Reserved for future expansion.
 
 1b - font-family
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => string follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => Reserved.
-						  0000001 => serif,
-						  0000010 => sans-serif,
-						  0000011 => cursive,
-						  0000100 => fantasy,
-						  0000101 => monospace,
-						  other   => rffe.
+			bit 7 set => string follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => Reserved.
+					  0000001 => serif,
+					  0000010 => sans-serif,
+					  0000011 => cursive,
+					  0000100 => fantasy,
+					  0000101 => monospace,
+					  other   => rffe.
 
 	If the value indicates that a string is present, then there is a 
 	parameter list. Each item is preceded by a <value> word which declares
@@ -493,42 +458,38 @@ Opcodes
 	all bits clear.
 
 1c - font-size
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7:
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => dimension follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => xx-small,
-						  0000001 => x-small,
-						  0000010 => small,
-						  0000011 => medium,
-						  0000100 => large,
-						  0000101 => x-large,
-						  0000110 => xx-large,
-						  0000111 => larger,
-						  0001000 => smaller,
-						  other   => rffe.
+			bit 7 set => dimension follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => xx-small,
+					  0000001 => x-small,
+					  0000010 => small,
+					  0000011 => medium,
+					  0000100 => large,
+					  0000101 => x-large,
+					  0000110 => xx-large,
+					  0000111 => larger,
+					  0001000 => smaller,
+					  other   => rffe.
 
 1d - font-style
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => normal,
 		1     => italic,
 		2     => oblique,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 1e - font-variant
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => normal,
 		1     => small-caps,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 1f - font-weight
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => normal,
 		1     => bold,
 		2     => bolder,
@@ -542,80 +503,68 @@ Opcodes
 		a     => 700,
 		b     => 800,
 		c     => 900,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 20 - height
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => length or percentage follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => auto,
-						  other   => rffe.
+			bit 7 set => length or percentage follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => auto,
+					  other   => rffe.
 
 21 - left
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => length or percentage follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => auto,
-						  other   => rffe.
+			bit 7 set => length or percentage follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => auto,
+					  other   => rffe.
 
 22 - letter-spacing
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => length follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => normal,
-						  other   => rffe.
+			bit 7 set => length follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => normal,
+					  other   => rffe.
 
 23 - line-height
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => length/number/percentage follows
-					bits 0-6: 0000000 => number,
-						  0000001 => dimension,
-						  other   => rffe.
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => normal,
-						  other   => rffe.
+			bit 7 set => length/number/percentage follows
+				bits 0-6: 0000000 => number,
+					  0000001 => dimension,
+					  other   => rffe.
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => normal,
+					  other   => rffe.
 
 24 - list-style-image
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => string follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => none,
-						  other   => rffe.
+			bit 7 set => string follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => none,
+					  other   => rffe.
 
 25 - list-style-position
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => inside,
 		1     => outside,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 26 - list-style-type
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => disc,
 		1     => circle,
 		2     => square,
@@ -632,89 +581,77 @@ Opcodes
 		d     => lower-alpha,
 		e     => upper-alpha,
 		f     => none,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 27 - margin-{top,right,bottom,left}
-	<value> (32bits) :
-		bits 10-31: MBZ
+	<value> (14bits) :
+		bits 10-13: MBZ
 		bits 8-9  :
 			00 => top,
 			01 => right,
 			10 => bottom,
 			11 => left
 		bits 0-7  :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => length or percentage follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => auto,
-						  other   => rffe.
+			bit 7 set => length or percentage follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => auto,
+					  other   => rffe.
 
 28 - max-height
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => length or percentage follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => none,
-						  other   => rffe.
+			bit 7 set => length or percentage follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => none,
+					  other   => rffe.
 
 29 - max-width
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => length or percentage follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => none,
-						  other   => rffe.
+			bit 7 set => length or percentage follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => none,
+					  other   => rffe.
 
 2a - min-height
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
 			00000000 => length or percentage follows,
 			other    => Reserved for future expansion.
 
 2b - min-width
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
 			00000000 => length or percentage follows,
 			other    => Reserved for future expansion.
 
 2c - orphans
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
 			00000000 => integer follows,
 			other    => Reserved for future expansion.
 
 2d - outline-color
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => colour follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => invert,
-						  other   => rffe.
+			bit 7 set => colour follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => invert,
+					  other   => rffe.
 
 2e - outline-style
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
 			00000000 => none,
 			00000001 => hidden,
@@ -726,147 +663,129 @@ Opcodes
 			00000111 => ridge,
 			00001000 => inset,
 			00001001 => outset,
-			11111111 => inherit,
 			other    => Reserved for future expansion.
 
 2f - outline-width
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => length follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => thin,
-						  0000001 => medium,
-						  0000010 => thick,
-						  other   => rffe.
+			bit 7 set => length follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => thin,
+					  0000001 => medium,
+					  0000010 => thick,
+					  other   => rffe.
 
 30 - overflow
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => visible,
 		1     => hidden,
 		2     => scroll,
 		3     => auto,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 31 - padding-{top,right,bottom,left}
-	<value> (32bits) :
-		bits 10-31: MBZ
+	<value> (14bits) :
+		bits 10-13: MBZ
 		bits 8-9  :
 			00 => top,
 			01 => right,
 			10 => bottom,
 			11 => left
 		bits 0-7  :
-			11111111 => inherit,
 			00000000 => length or percentage follows,
 			other    => Reserved for future expansion.
 
 32 - page-break-after
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => auto,
 		1     => always,
 		2     => avoid,
 		3     => left,
 		4     => right,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 33 - page-break-before
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => auto,
 		1     => always,
 		2     => avoid,
 		3     => left,
 		4     => right,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 34 - page-break-inside
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => avoid,
 		1     => auto,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 35 - pause-after
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
 			00000000 => time or percentage follows,
 			other    => Reserved for future expansion.
 
 36 - pause-before
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
 			00000000 => time or percentage follows,
 			other    => Reserved for future expansion.
 
 37 - pitch-range
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
 			00000000 => number follows,
 			other    => Reserved for future expansion.
 
 38 - pitch
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => frequency follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => x-low,
-						  0000001 => low,
-						  0000010 => medium,
-						  0000011 => high,
-						  0000100 => x-high,
-						  other   => rffe.
+			bit 7 set => frequency follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => x-low,
+					  0000001 => low,
+					  0000010 => medium,
+					  0000011 => high,
+					  0000100 => x-high,
+					  other   => rffe.
 
 39 - play-during
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => string follows
-					bit 6: set => mix, clear => don't mix
-					bit 5: set => repeat, clear => no repeat
-					bits 0-4: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => auto,
-						  0000001 => none,
-						  other   => rffe.
+			bit 7 set => string follows
+				bit 6: set => mix, clear => don't mix
+				bit 5: set => repeat, clear => no repeat
+				bits 0-4: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => auto,
+					  0000001 => none,
+					  other   => rffe.
 
 3a - position
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => static,
 		1     => relative,
 		2     => absolute,
 		3     => fixed,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 3b - quotes
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => two strings follow
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => none,
-						  other   => rffe.
+			bit 7 set => two strings follow
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => none,
+					  other   => rffe.
 
 	If the value indicates that strings are present, then there is a 
 	parameter list. Each item is preceded by a <value> word which declares
@@ -874,101 +793,88 @@ Opcodes
 	all bits clear (the encoding for "none").
 
 3c - richness
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
 			00000000 => number follows,
 			other    => Reserved for future expansion.
 
 3d - right
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => length or percentage follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => auto,
-						  other   => rffe.
+			bit 7 set => length or percentage follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => auto,
+					  other   => rffe.
 
 3e - speak-header
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => once,
 		1     => always,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 3f - speak-numeral
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => digits,
 		1     => continuous,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 40 - speak-punctuation
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => code,
 		1     => none,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 41 - speak
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => normal,
 		1     => none,
 		2     => spell-out,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 42 - speech-rate
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => number follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => x-slow,
-						  0000001 => slow,
-						  0000010 => medium,
-						  0000011 => fast,
-						  0000100 => x-fast,
-						  0000101 => faster,
-						  0000110 => slower,
-						  other   => rffe.
+			bit 7 set => number follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => x-slow,
+					  0000001 => slow,
+					  0000010 => medium,
+					  0000011 => fast,
+					  0000100 => x-fast,
+					  0000101 => faster,
+					  0000110 => slower,
+					  other   => rffe.
 
 43 - stress
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
 			00000000 => number follows,
 			other    => Reserved for future expansion.
 
 44 - table-layout
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => auto,
 		1     => fixed,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 45 - text-align
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => left,
 		1     => right,
 		2     => center,
 		3     => justify,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 46 - text-decoration
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit
 			00000000 => none
 			otherwise:
 				bits 4-7: MBZ
@@ -979,83 +885,73 @@ Opcodes
 				bit 0: set => underline, clear => no underline
 
 47 - text-indent
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
 			00000000 => length or percentage follows,
 			other    => Reserved for future expansion.
 
 48 - text-transform
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => capitalize,
 		1     => uppercase,
 		2     => lowercase,
 		3     => none,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 49 - top
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => length or percentage follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => auto,
-						  other   => rffe.
+			bit 7 set => length or percentage follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => auto,
+					  other   => rffe.
 
 4a - unicode-bidi
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => normal,
 		1     => embed,
 		2     => bidi-override,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 4b - vertical-align
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => length or percentage follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => baseline,
-						  0000001 => sub,
-						  0000010 => super,
-						  0000011 => top,
-						  0000100 => text-top,
-						  0000101 => middle,
-						  0000110 => bottom,
-						  0000111 => text-bottom,
-						  other   => rffe.
+			bit 7 set => length or percentage follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => baseline,
+					  0000001 => sub,
+					  0000010 => super,
+					  0000011 => top,
+					  0000100 => text-top,
+					  0000101 => middle,
+					  0000110 => bottom,
+					  0000111 => text-bottom,
+					  other   => rffe.
 
 4c - visibility
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => visible,
 		1     => hidden,
 		2     => collapse,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 4d - voice-family
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => string follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => Reserved.
-						  0000001 => male,
-						  0000010 => female,
-						  0000011 => child,
-						  other   => rffe.
+			bit 7 set => string follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => Reserved.
+					  0000001 => male,
+					  0000010 => female,
+					  0000011 => child,
+					  other   => rffe.
 
 	If the value indicates that a string is present, then there is a 
 	parameter list. Each item is preceded by a <value> word which declares
@@ -1063,77 +959,67 @@ Opcodes
 	all bits clear.
 	
 4e - volume
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => number/percentage follows
-					bits 0-6: 0000000 => number,
-						  0000001 => dimension,
-						  other   => rffe.
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => silent,
-						  0000001 => x-soft,
-						  0000010 => soft,
-						  0000011 => medium,
-						  0000100 => loud,
-						  0000101 => x-loud,
-						  other   => rffe.
+			bit 7 set => number/percentage follows
+				bits 0-6: 0000000 => number,
+					  0000001 => dimension,
+					  other   => rffe.
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => silent,
+					  0000001 => x-soft,
+					  0000010 => soft,
+					  0000011 => medium,
+					  0000100 => loud,
+					  0000101 => x-loud,
+					  other   => rffe.
 
 4f - white-space
-	<value> (32bits) :
+	<value> (14bits) :
 		0     => normal,
 		1     => pre,
 		2     => nowrap,
 		3     => pre-wrap,
 		4     => pre-line,
-		0xff  => inherit,
 		other => Reserved for future expansion.
 
 50 - widows
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
 			00000000 => integer follows,
 			other    => Reserved for future expansion.
 
 51 - width
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => length or percentage follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => auto,
-						  other   => rffe.
+			bit 7 set => length or percentage follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => auto,
+					  other   => rffe.
 
 52 - word-spacing
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => length follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => normal,
-						  other   => rffe.
+			bit 7 set => length follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => normal,
+					  other   => rffe.
 
 53 - z-index
-	<value> (32bits) :
-		bits 8-31: MBZ
+	<value> (14bits) :
+		bits 8-13: MBZ
 		bits 0-7 :
-			11111111 => inherit,
-			otherwise:
-				bit 7 set => integer follows
-					bits 0-6: MBZ
-				bit 7 clear => keywords:
-					bits 0-6: 0000000 => auto,
-						  other   => rffe.
+			bit 7 set => integer follows
+				bits 0-6: MBZ
+			bit 7 clear => keywords:
+				bits 0-6: 0000000 => auto,
+					  other   => rffe.
 
-54-ffff - Reserved for future expansion.
+54-ff - Reserved for future expansion.