They may appear in any order. Attribute names are always case-insensitive.
Attribute values are generally case-insensitive.
The standard HTML color specification methods. The default value for this attribute is the decimal point character for the current specified language. A case-sensitive character within the current character set. Integers indicating pixel offset values. The number of total columns in a table should equal the number of cells specified later in the table structure, but it is possible to specify a SPAN value of 0, which indicates that the current COL element spans all remaining columns.