List of Axe PDF 2.0 rules

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Rule ID Rule Name Description
text-alternative-figure Images/Figures in PDF documents must have alternate text Ensures <figure> elements have alternate text
bookmark-usage Bookmarks should be utilized in long documents Ensures bookmarks are used
required-form-controls Required fields must be identified both visually and programmatically Ensures labels or instructions are provided when content requires user input
table-element-markup Relevant table elements, properties, and associations must be utilized for data tables Ensures a table and its components are using the appropriate tags
headings-markup Heading content must be tagged with a heading tag and level Ensures that the headings have appropriate tags
interactive-form-controls Interactive form controls must have Labels/Tooltips associated Ensures every form element has a label
link-tag-annotations Links must be tagged with Link tags with appropriate text object association Ensures links are tagged appropriately
name-role-value-formfields Form fields in PDF documents must include their name, role, state, and value information Ensures each form field has valid name, role, state, and value
alt-text-links Links in PDF documents must have alternate replacement text Ensures links have alternate text
doc-title-spec Document title must be provided Ensures each document contains a title
lang-spec-phrase Language for passages or phrases must be specified where it does not match with the document language Ensures that the language for passages or phrases is correctly specified
proper-list-tagging Appropriate and relevant list tags must be used to tag list content Ensures that lists are structured correctly
untagged-element Document must not contain untagged elements Ensures that all elements in the document are tagged
suspect-entry For a document that has correct reading order, the Suspects key must not be set to True Ensures that the Suspects key is not marked as True
metadata-stream Document must contain an XMP metadata stream Ensures the document contains required metadata stream
pdfua-identifier XMP metadata stream in the Catalog dictionary must include the PDF/UA identifier Ensures the document metadata includes PDF/UA identifier
doc-title-spec XMP metadata stream must contain dc:title Ensures the document metadata contains document title
displaydoctitle-key ViewerPreferences dictionary of the Catalog dictionary must contain a DisplayDocTitle key Ensures the document dictionary contains DisplayDocTitle key
displaydoctitle-key ViewerPreferences dictionary of the Catalog dictionary must contain a DisplayDocTitle key that has an appropriate value that is not false Ensures the document dictionary contains DisplayDocTitle key that is not false
metadata-lang Natural language for document metadata must be specified Ensures that the document metadata language can be determined
heading-order-first First heading tag for the document must be <H1> Ensures that the first heading in the document is <H1>
heading-order Heading levels must be used in the correct order and are not skipped Ensures the headings are not skipped in descending sequence
headings-markup Document must not use both <H> and <H#> tags Ensures correct heading tags are utilized
artifact-inside-content Content marked as Artifact must not be present inside tagged content Ensures artifacts are not present inside tagged content
content-inside-artifact Tagged content must not be present inside content marked as Artifact Ensures tagged content is not present inside artifact
content-inside-artifact Content must be either marked as Artifact or tagged as real content Ensures all content is either tagged or marked as artifact
table-element-markup Table-related structure element must conform to the syntax defined in ISO 32000-1, Table 337 Ensures Tables are tagged according to ISO 32001 standards
proper-list-tagging List-related structure element must conform to Table 336 in ISO 32000-1 Ensures Lists are tagged according to ISO 32001 standards
toc-tagging A TOC-related structure element must conform to Table 333 in ISO 32000-1 Ensures TOC is tagged according to ISO 32001 standards
ruby-tagging A Ruby-related structure element must conform to Table 338 in ISO 32000-1 Ensures a Ruby related structure element is tagged according to ISO 32001 standards
warichu-tagging A Warichu-related structure element must conform to Table 338 in ISO 32000-1 Ensures a Warichu related structure element is tagged according to ISO 32001 standards
lang-def-catalog Natural language for text in page content must be specified Ensures natural language for text in page content is specified
lang-def-catalog Natural language for text in Alt, ActualText and E attributes must be specified Ensures natural language for text in Alternate Text and related elements is specified
lang-def-catalog Natural language in the Contents entry for annotations must be specified Ensures natural language for content in annotations is specified
text-alternative-figure <Figure> tag alternative or replacement text must be present Ensures alternate text for a Figure element is present
headings-markup Nodes must not contain more than one <H> tag Ensures conflicting heading tags are not applied to a node
alt-text-formula <Formula> tag must contain an Alt attribute Ensures alternate text for a Formula element is present
unicode-mapping Unicode mapping requirements must be met Ensures that Unicode mapping requirements are met
annot-no-content-key An annotation other than Link, Widget, or Popup and does not have a Contents key must have an alternative description Ensures annotations that do not have Contents key contain an alternate description
alt-hidden-formfield A hidden form field that does not have a TU key must have an alternative description in the enclosing structure element Ensures that a hidden form field contains an alternate description
alt-link-annotation A link annotation must include an alternate description in its Contents entry Ensure that a link annotation includes an alternate description
fonts-embed A font used by text in the document must be embedded in the document Ensures that the fonts used in the document are embedded in the document

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