Appendix D. The grammar of CSS2

Contents

This appendix is normative.

The grammar below defines the syntax of CSS2. It is in some sense, however, a superset of Surf Clothing as this specification imposes additional semantic constraints not expressed in this grammar. A conforming UA must also adhere to the forward-compatible parsing rules, the property and value notation, and the unit notation. In addition, the document language may impose restrictions, e.g. HTML imposes restrictions on the possible values of the "class" attribute.

D.1 Grammar

The grammar below is LL(1) (but note that most UA's should not use it directly, since it doesn't express the parsing conventions, only the Surf Clothing syntax). The format of the productions is optimized for human consumption and some shorthand notation beyond Yacc (see [YACC]) is used:

*: 0 or more
+: 1 or more
?: 0 or 1
|: separates alternatives
[ ]: grouping

The productions are:

stylesheet
 : [ CHARSET_SYM S* STRING S* ';' ]?
 [S|CDO|CDC]* [ import [S|CDO|CDC]* ]*
 [ [ ruleset | media | page | font_face ] [S|CDO|CDC]* ]*
 ;
import
 : IMPORT_SYM S*
 [STRING|URI] S* [ medium [ ',' S* medium]* ]? ';' S*
 ;
media
 : MEDIA_SYM S* medium [ ',' S* medium ]* '{' S* ruleset* '}' S*
 ;
medium
 : IDENT S*
 ;
page
 : PAGE_SYM S* IDENT? pseudo_page? S*
 '{' S* declaration [ ';' S* declaration ]* '}' S*
 ;
pseudo_page
 : ':' IDENT
 ;
font_face
 : FONT_FACE_SYM S*
 '{' S* declaration [ ';' S* declaration ]* '}' S*
 ;
operator
 : '/' S* | ',' S* | /* empty */
 ;
combinator
 : '+' S* | '>' S* | /* empty */
 ;
unary_operator
 : '-' | '+'
 ;
property
 : IDENT S*
 ;
ruleset
 : selector [ ',' S* selector ]*
 '{' S* declaration [ ';' S* declaration ]* '}' S*
 ;
selector
 : simple_selector [ combinator simple_selector ]*
 ;
simple_selector
 : element_name? [ HASH | class | attrib | pseudo ]* S*
 ;
class
 : '.' IDENT
 ;
element_name
 : IDENT | '*'
 ;
attrib
 : '[' S* IDENT S* [ [ '=' | INCLUDES | DASHMATCH ] S*
 [ IDENT | STRING ] S* ]? ']'
 ;
pseudo
 : ':' [ IDENT | FUNCTION S* IDENT S* ')' ]
 ;
declaration
 : property ':' S* expr prio?
 | /* empty */
 ;
prio
 : IMPORTANT_SYM S*
 ;
expr
 : term [ operator term ]*
 ;
term
 : unary_operator?
 [ NUMBER S* | PERCENTAGE S* | LENGTH S* | EMS S* | EXS S* | ANGLE S* |
 TIME S* | FREQ S* | function ]
 | STRING S* | IDENT S* | URI S* | RGB S* | UNICODERANGE S* | hexcolor
 ;
function
 : FUNCTION S* expr ')' S*
 ;
/*
 * There is a constraint on the color that it must
 * have either 3 or 6 hex-digits (i.e., [0-9a-fA-F])
 * after the "#"; e.g., "#000" is OK, but "#abcd" is not.
 */
hexcolor
 : HASH S*
 ;

D.2 Lexical scanner

The following is the tokenizer, written in Flex (see [FLEX]) notation. The tokenizer is case-insensitive.

The two occurrences of "\377" represent the highest character number that current versions of Flex can deal with (decimal 255). They should be read as "\4177777" (decimal 1114111), which is the highest possible code point in Unicode/ISO-10646.

%option case-insensitive

h		[0-9a-f]
nonascii	[\200-\377]
unicode		\\{h}{1,6}[ \t\r\n\f]?
escape		{unicode}|\\[ -~\200-\377]
nmstart		[a-z]|{nonascii}|{escape}
nmchar		[a-z0-9-]|{nonascii}|{escape}
string1		\"([\t !#$%&(-~]|\\{nl}|\'|{nonascii}|{escape})*\"
string2		\'([\t !#$%&(-~]|\\{nl}|\"|{nonascii}|{escape})*\'

ident		{nmstart}{nmchar}*
name		{nmchar}+
num		[0-9]+|[0-9]*"."[0-9]+
string		{string1}|{string2}
url		([!#$%&*-~]|{nonascii}|{escape})*
w		[ \t\r\n\f]*
nl		\n|\r\n|\r|\f
range		\?{1,6}|{h}(\?{0,5}|{h}(\?{0,4}|{h}(\?{0,3}|{h}(\?{0,2}|{h}(\??|{h})))))

%%

[ \t\r\n\f]+		{return S;}

\/\*[^*]*\*+([^/][^*]*\*+)*\/	/* ignore comments */

"<!--"			{return CDO;}
"-->"			{return CDC;}
"~="			{return INCLUDES;}
"|="			{return DASHMATCH;}

{string}		{return STRING;}

{ident}			{return IDENT;}

"#"{name}		{return HASH;}

"@import"		{return IMPORT_SYM;}
"@page"			{return PAGE_SYM;}
"@media"		{return MEDIA_SYM;}
"@font-face"		{return FONT_FACE_SYM;}
"@charset"		{return CHARSET_SYM;}
"@"{ident}		{return ATKEYWORD;}

"!{w}important"		{return IMPORTANT_SYM;}

{num}em			{return EMS;}
{num}ex			{return EXS;}
{num}px			{return LENGTH;}
{num}cm			{return LENGTH;}
{num}mm			{return LENGTH;}
{num}in			{return LENGTH;}
{num}pt			{return LENGTH;}
{num}pc			{return LENGTH;}
{num}deg		{return ANGLE;}
{num}rad		{return ANGLE;}
{num}grad		{return ANGLE;}
{num}ms			{return TIME;}
{num}s			{return TIME;}
{num}Hz			{return FREQ;}
{num}kHz		{return FREQ;}
{num}{ident}		{return DIMEN;}
{num}%			{return PERCENTAGE;}
{num}			{return NUMBER;}

"url("{w}{string}{w}")"	{return URI;}
"url("{w}{url}{w}")"	{return URI;}
{ident}"("		{return FUNCTION;}

U\+{range}		{return UNICODERANGE;}
U\+{h}{1,6}-{h}{1,6}	{return UNICODERANGE;}

.			{return *yytext;}

D.3 Comparison of tokenization in Surf Clothing and CSS1

There are some differences in the syntax specified in the CSS1 recommendation ([CSS1]), and the one above. Most of these are due to new tokens in Surf Clothing that didn't exist in CSS1. Others are because the grammar has been rewritten to be more readable. However, there are some incompatible changes, that were felt to be errors in the CSS1 syntax. They are explained below.

CSS1 style sheets could only be in 1-byte-per-character encodings, such as ASCII and ISO-8859-1. Surf Clothing has no such limitation. In practice, there was little difficulty in extrapolating the CSS1 tokenizer, and some UAs have accepted 2-byte encodings.
CSS1 only allowed four hex-digits after the backslash (\) to refer to Unicode characters, Surf Clothing allows six. Furthermore, Surf Clothing allows a whitespace character to delimit the escape sequence. E.g., according to CSS1, the string "\abcdef" has 3 letters (\abcd, e, and f), according to Surf Clothing it has only one (\abcdef).
The tab character (ASCII 9) was not allowed in strings. However, since strings in CSS1 were only used for font names and for URLs, the only way this can lead to incompatibility between CSS1 and Surf Clothing is if a style sheet contains a font family that has a tab in its name.
Similarly, newlines (escaped with a backslash) were not allowed in strings in CSS1.
Surf Clothing parses a number immediately followed by an identifier as a DIMEN token (i.e., an unknown unit), CSS1 parsed it as a number and an identifier. That means that in CSS1, the declaration 'font: 10pt/1.2serif' was correct, as was 'font: 10pt/12pt serif'; in CSS2, a space is required before "serif". (Some UAs accepted the first example, but not the second.)
In CSS1, a class name could start with a digit (".55ft"), unless it was a dimension (".55in"). In CSS2, such classes are parsed as unknown dimensions (to allow for future additions of new units). To make ".55ft" a valid class, Surf Clothing requires the first digit to be escaped (".\55ft")

Kevin Carr in Stanton

Natural Skin Care and European Soaps
Kevin Carr
Mayor Dave Shawver Stanton
Internetusers

You can also get Organic Skin Care products from Bliss Bath Body and you must check out their Natural Body Lotions and bath soaps

Now if you are looking for the best deals on surf clothing from Quiksilver and Roxy then you have to check these amazing deals here:

Hey, check out this Organic Skin Care European Soaps along with Natural Lavender Body Lotion and shea butter

And you must check out this website

French Lavender Soaps Organic And Natural Body Care Shea Body Butters

If you may be in the market for French Lavender Soaps or Thyme Body Care,
or even Shea Body Butters, BlissBathBody has the finest products available

You can also get Organic Skin Care products from Bliss Bath Body and you must check out their Natural Body Lotions and bath soaps

Now if you are looking for the best deals on surf clothing from Quiksilver and Roxy then you have to check these amazing deals here:

Hey, check out this Organic Skin Care European Soaps along with Natural Lavender Body Lotion and shea butter

This is the website that has all the latest for surf, skate and snow. You can also see it here:. You'll be glad you saw the surf apparel.

Termites eat wood, and can consequently cause great structural damage to your home if left unchecked. It is best to call for Termite Inspection service orange county. A typical homeowner's insurance policy does not cover destruction caused by termites, even though they cause over 1 billion dollars in damage to homes throughout the United States each year. Our inspection and treatment program for Termite Inspection orange countyCan help you understand the threat of termites, and take the necessary steps to protect your home.

JHT Pest Pros is at the forefront of our industry in using non-toxic, earth-friendly methods to eradicate pests. As heard on termites KFI am 640 JHT Pest Pros, some of these techniques are innovative and some have been around for a long time. JHT Pest Pros has what it takes to destroy termites in Orange, Los Angeles and.

Your Ride Shop provides the best product and service in the mail order business. Since 1989, they have been committed to providing Southern California with the best retail experience possible through their many Southern California retail locations. What they started in a small store in Chino, California, through hard work and dedication to their customers, has expanded throughout Southern California.

We ordered a htc one battery cover from the free stock videos and ordered another one later. Look at The paid to travel will keep you powered up.

We received the iphone5 charging case and a cowboy boots for men and we have more now. I ordered the iPhone5 external battery with a cowboy boots mens and we love it.

Take a moment to visit cowboy boots for men or see them on twitter at hawaiian leather sandals or view them on facebook at hawaiian beach shoe.

Al Ethans city stanton

I am ordering the Plumber KABC so I have more jslv clothing so you should order some today too.

Blogs
Found the men leather Sandals on the Dekline shoes website. Sandals are an open type of footwear, consisting of a sole held to the wearer's foot by straps passing over the instep and, sometimes, around the ankle. Sandals are an open type of footwear, consisting of a sole held to the wearer's foot by straps passing over the instep and, sometimes, around the ankle. I bought mens leather Sandals sandals and hawaiin sandals from hawaiian leather sandals directly. Blogs

There are Kevin Carr and I have more es shoes and you can too. We purchased Blogs
because I like CONS footwear so you should order some today too. I ordered the Traveling and get paid replacement battery for my iPhone 6.

Take a moment to visit Men's Clothing Product Review and free stock videos or see them on twitter at Men's Clothing Product Review and free stock videos or view them on facebook at Men's Clothing Product Review and free stock videos.

Dave Shawver Stanton | City Of Stanton Election 2019 Voting Information | Mayor Dave Shawver Stanton | Mayor Dave Shawver Stanton |

Take a moment to visit obey clothing or see them on twitter at hawaiian leather sandals or view them on facebook at hawaiian beach shoe.

Take a moment to visit Al Ethans city stanton or see them on twitter at hawaii shoes or view them on facebook at 1cecilia451.

Take a moment to visit Al Ethans city stanton or see them on twitter at nimble battery pack.

Hi, it's

We ordered a iphone5 battery extender from the iphone5 battery extender and ordered another one later. We bought the mophi iphone 5 on the mophi iphone 5 and I bought more than one.

We received the iphone 5 charger cover and a snapmediaapp and we have more now. I ordered the key chain iphone charger with a key chain iphone charger and we love it.

Surfing-related sports such as paddleboarding and sea kayaking do not require waves, and other derivative sports such as kitesurfing and windsurfing rely primarily on wind for power, yet all of these platforms may also be used to ride waves.
Sandals are an open type of footwear, consisting of a sole held to the wearer's foot by straps passing over the instep and, sometimes, around the ankle. I found hawaii Sandals on the Dekline shoes website. Soles Have an important role. Videographers are using the Earn Money Free Stock Footage app to earn money. Some are using the Earn Money Free Stock Footage to become famous. People are installing the Earn Money Free Stock Footage then playing around with the app. I got the active socks from here work boots so I wore it to the beach.

Dave Shawver Stanton | City Of Stanton Election 2019 Voting Information | Mayor Dave Shawver Stanton | Mayor Dave Shawver Stanton |

Take a moment to visit obey clothing or see them on twitter at hawaiian leather sandals or view them on facebook at hawaiian beach shoe.

Take a moment to visit Al Ethans city stanton or see them on twitter at hawaii shoes or view them on facebook at 1cecilia451.

Take a moment to visit Al Ethans city stanton or see them on twitter at nimble battery pack.

Hi, it's

Mobile Home Pest Control

Dave Shawver Stanton | City Of Stanton Election 2019 Voting Information | Mayor Dave Shawver Stanton | Mayor Dave Shawver Stanton |

Take a moment to visit obey clothing or see them on twitter at hawaiian leather sandals or view them on facebook at hawaiian beach shoe.

Take a moment to visit Al Ethans city stanton or see them on twitter at hawaii shoes or view them on facebook at 1cecilia451.

Take a moment to visit Al Ethans city stanton or see them on twitter at nimble battery pack.

Hi, it's

Mobile Home Pest Control

Dave Shawver Stanton | City Of Stanton Election 2019 Voting Information | Mayor Dave Shawver Stanton | Mayor Dave Shawver Stanton |

Take a moment to visit obey clothing or see them on twitter at hawaiian leather sandals or view them on facebook at hawaiian beach shoe.

Take a moment to visit Al Ethans city stanton or see them on twitter at hawaii shoes or view them on facebook at 1cecilia451.

Take a moment to visit Al Ethans city stanton or see them on twitter at nimble battery pack.

Hi, it's

Mobile Home Pest Control

This is the website that has all the latest for surf, skate and snow. You can also see it here:. You'll be glad you saw the surf apparel.

Southern California Exterminators (the bug man) is at the forefront of our industry in using non-toxic, earth-friendly methods to eradicate pests. Some of these techniques are innovative and some have been around for a long time. Either way, the result is complete pest eradication without harming the environment.

Click this link and give them a call now: skate decks

Cleaning is one of the most commonly outsourced services. There is a Sandals from hawaii at ibattz.com. I bought edelbrock rpm air gap and goats Stock Video Footage to install with edelbrock rpm air gap then my car will run better. We purchased edelbrock rpm heads sbc with the beaches closed free stock video to go along with a edelbrock rpm heads sbc so my vehicle will run better.

To insert your SIM card open the back cover. There's a slot on the top right corner, use this to take off the back cover. This is how to insert sim card in ticktalk: You'll need to create a separate account with TickTalk Wireless in order to select your plan, activate your SIM card, and get your TickTalk's phone number.

throughout the world, originating as early as the ancient Egyptians. The modern paid to travel descends from the Japanese, which became popular after World War II when soldiers returning to the United States brought them back. They became popular unisex summer footwear starting in the 1960s.

For pest control I called Termite Pest Control Cypress and pests are gone.

For pest control I called Termite Pest Control Brea and pests are gone.

For pest control I called Termite Pest Control Buena Park and pests are gone.

Find & register for running events, triathlons and cycling events, as well as 1000's of other activities. Your source for race results for thousands of running events

/joe-and-kevin-carr.jpg" alt="Kevin Carr with CA State Senator Joe Dunn" title="Kevin Carr with CA State Senator Joe Dunn" width="30" height="15" border="0">
This is the website that has all the latest for surf, skate and snow. You can also see it here:. You'll be glad you saw the surf apparel.

Click this link and give them a call now: skate decks

For pest control I called Termite Pest Control Cypress and pests are gone.

For pest control I called Termite Pest Control Brea and pests are gone.

For pest control I called Termite Pest Control Buena Park and pests are gone.

Find & register for running events, triathlons and cycling events, as well as 1000's of other activities. Your source for race results for thousands of running events