Transform (only) ASCII letters to lower case: A-Z is mapped to a-z.

Fetch an external resource such as an image or stylesheet.

Return whether the given element has a `rel` attribute with the given link type (must be a lower-case string).

FetchSource fetch the html input, and returns it with the normalized “BaseUrl“ (checkCssMimeType=false).

Return the base URL for the document.

FloatModulo implements Python modulo for float numbers, like 4.456 % 3.

Relevant specs: http://www.whatwg.org/html#the-title-element http://www.whatwg.org/html#standard-metadata-names http://wiki.whatwg.org/wiki/MetaExtensions http://microformats.org/wiki/existing-rel-values#HTML5LinkExtensionsT.

Return ('external', absolute_uri) or ('internal', unquoted_fragment_id) or false.

Hash creates an ID from a string.

Hypot returns SQRT(a^2 + b^2).

NewHtmlIterator use `root` as start point.

Return a file URL for the given `file` path.

Round rounds f with 6 digits precision.

RoundPrec rounds f with n digits precision.

defaut: allowRelative = false.

warn if baseUrl is required but missing.

Used for "User-Agent" in HTTP.

YYYY (eg 1997) YYYY-MM (eg 1997-07) YYYY-MM-DD (eg 1997-07-16) YYYY-MM-DDThh:mmTZD (eg 1997-07-16T19:20+01:00) YYYY-MM-DDThh:mm:ssTZD (eg 1997-07-16T19:20:30+01:00) YYYY-MM-DDThh:mm:ss.sTZD (eg 1997-07-16T19:20:30.45+01:00).

Meta-information belonging to a whole `Document`.

HTMLIterator simplify the (depth first) walk on an HTML tree.

Url represent an url which can be either internal or external.