validation arguments

These switches are only useful if you have bespoke HTML and CSS on your website. They allow you to define additional valid values of certain data types. Start with the --validation switch, and go on from there.

validation	Only available from the command line. Lists all types that can be given additional valid values.
validation.attribute ATT	Add the custom attribute ATT. This attribute will be ignored, not validated.
validation.charset CH	Accept CH as a charset. May be repeated.
validation.class CL	Add the valid class CL. May be repeated.
validation.color COL	Accept COL as a colour. May be repeated.
validation.colour COL	Accept COL as a colour. May be repeated.
validation.country CC	Accept CC as a valid two-letter country code. May be repeated.
validation.currency CUR	Accept CUR as a valid currency. May be repeated.
validation.element EL	Accept <EL> as a valid element. This element will be ignored, not validated. May be repeated.
validation.element-attribute EL,ATT	Accept the known attribute ATT on the element <EL>. Doesn’t work with namespaces (names containing ‘:’). May be repeated.
validation.extension EXT	Accept the extension EXT as a mimetype file extension. May be repeated.
validation.ff FEATURE	Accept FEATURE as a CSS font feature. These should normally be four characters long. May be repeated.
validation.ff VARIATION	Accept VARIATION as a CSS font variation. These should normally be four characters long. May be repeated.
validation.httpequiv HEQ	Accept HEQ as a valid macro for httpequiv on <META> elements. May be repeated.
validation.lang LANG	Accept LANG as a valid language code. May be repeated.
validation.minor x M -m x	When validating W3 HTML 5 source code, using this minor version of W3 HTML 5. Valid values are 0, 1, 2, and 3 (draft). WhatWG versions are determined by date, corresponding roughly to the date of the (online) publication of the specific version. See the --html.version switch.
validation.metaname M	Accept M as valid for the NAME attribute of the <META> element. The VALUE will be ignored. May be repeated.
validation.microdata	Validate (schema.org) microdata.
validation.mimetype MT	Accept MT as a valid mimetype. May be repeated.
validation.sgml GML	Accept SGML as a valid SGML schema identification (as found in <!DOCTYPE…>. May be repeated.
validation.XXX YYY	Accept YYY as a valid value for attribute type XXX. For a list of possible values of XXX, use the command line switch --validation.

Dylan Harris
December 2024