Module charsets 

Defines syntactical properties of HTML tags, attributes, and text.

Functions

is_valid_in_attribute_name

Check whether a character is valid in an attribute name.

is_valid_in_attribute_value

Check whether a character can be an used in an attribute value without escaping.

is_valid_in_normal_element_text

Check whether a character can be an used in normal text without escaping.

is_valid_in_tag_name

Check whether a character is in a tag name.

is_w3c_text_char

Check if something is valid text in HTML.