Category	Subject	Sinopsys	Description	Example/Values
	*	All elements
	div	<div>
	div *	All elements within <div>
	Contextual selectors	One or more selectors delimited by spaces.The example rule indicates the bold markup will be red only while enclosed in H1 tags.	H1 B {color: red;}
	Grouping	One or more selectors separated by commas. Grouping allows you to assign styles to multiple elements (selectors).	H1, H2, H3, H5 {color: purple;}
	div > span	<span> with parent <div>
	div + span	<span> preceded by <div>
	Class(tag attribute)	Class selectors may be used as an attribute to a tag. A class selector is a string preceded by a period. Do not use the period when referencing the class. Do not begin a class name with a number, although IE4/5 let you get away with it.	.example {color: red;}
	div.class	<div> of class "class"
	#itemid	Element with id "itemid"
	div#itemid	<div> with id "itemid"
	a[attr]	<a> with attribute "attr"
	a[attr='x']	<a> when "attr" is "x"
	a[class~='x']	<a> when class is a list containing 'x'
	a[lang|='en']	<a> when lang begins "en"