Bad Images

	no @alt	empty @alt	filled @alt
no @title
empty @title
filled @title

Bad Links

	no @href	empty @href	# fill @href	filled @href
no @title	link	link	link	link
empty @title	link	link	link	link
filled @title	link	link	link	link

Bad Tables

no @summary

empty @summary

filled @summary

no @scope

A	B
C	1

A	B
C	1

A	B
C	1

empty @scope

A	B
C	1

A	B
C	1

A	B
C	1

filled @scope

A	B
C	1

A	B
C	1

A	B
C	1

Empty Elements

Empty div

filled

Empty p

filled

Empty span

filled

Empty li

filled

Empty th, td

	filled
	filled

Bad Attributes

@cellspacing

@style

@align

@valign

@cellpadding

@border

@width; img[@width] okay

@height; img[@height] okay

Bad JavaScript Attributes

Bad Elements

font
center
b
i
big
small
marquee
blink
map

Missing Attributes

abbr missing @title: abbreviation
abbr empty @title: abbreviation
acronym missing @title: acronym
acronym empty @title: acronym
blockquote missing @cite: blockquote
blockquote empty @cite: blockquote
q missing @cite: q
q empty @cite: q
dfn missing @title: dfn
dfn empty @title: dfn
label missing @for: label
label empty @for: label
input missing @type
iput empty @type
iput wrong @disabled value
input wrong @readonly value
input wrong @checked value
select empty @size
select empty @name
select wrong @disabled
select wrong @multiple
optgroup missing @label
optgroup empty @label
optgroup wrong @disabled
option wrong @selected
option missing/empty @value mismatch
button missing @type
buttom empty @type
form missing/empty @method
form missing/empty @enctype
form missing/empty @accept, @accept-charset
textarea improper @disabled: textarea
textarea improper @readonly: textarea

		missing @datetime	empty @datetime	filled @datetime
missing @cite	`ins`	`ins`	`ins`	`ins`
missing @cite	`del`	~~`del`~~	~~`del`~~	~~`del`~~
empty @cite	`ins`	`ins`	`ins`	`ins`
empty @cite	`del`	~~`del`~~	~~`del`~~	~~`del`~~
filled @cite	`ins`	`ins`	`ins`	`ins`
filled @cite	`del`	~~`del`~~	~~`del`~~	~~`del`~~

Improperly Nested Form Fields

Input fields with/out forms and fieldsets
	No `form`	`form`
No `fieldset`
`fieldset`

Select fields with/out forms and fieldsets.
	No `form`	`form`
No `fieldset`
`fieldset`

Textareas with/out forms and fieldsets.
	No `form`	`form`
No `fieldset`	textarea	textarea
`fieldset`	textarea	textarea

Option fields with/out selects and optgroups.
	No `select`	`select`
No `optgroup`
`optgroup`

Improperly Nested Table Elements

This doesn't work because Firefox inserts a tbody when missing.

`thead`
`tfoot`
`tbody`
non-wrapped `tr`

address without vcard

address with vcard

address nested under vcard