Mensagens EPUBCheck explicadas

EPUBCheck relata cada problema em um EPUB como um código como RSC-005 ou OPF-014 com uma severidade. Esta referência lista todas as mensagens 246 de EPUBCheck 5.4.0 com seu texto oficial, e explica as causas e soluções para 188 delas.

Atualizado: 4 de Novembro de 2026

Severidades

Erro fatal: EPUBCheck não conseguiu continuar verificando esta parte do EPUB. O arquivo é inválido.
Erro: O EPUB quebra uma regra da especificação e é inválido. Lojas e Enviar para Kindle podem rejeitá-lo, e EPUBCheck sai com status 1.
Aviso: O EPUB ainda é válido, mas algo provavelmente causará problemas em alguns aplicativos de leitura. EPUBCheck sai com 0, a menos que você passe --failonwarnings.
Uso: Apenas informativo e oculto por padrão: aparece quando EPUBCheck é executado com -u (--usage). Não torna o EPUB inválido.
Informações: Apenas informativo. Não torna o EPUB inválido.
Suprimido: EPUBCheck não relata esta mensagem por padrão. Ela só aparece se um arquivo de mensagens personalizado (-c) alterar sua gravidade.

PKG: Pacote e contêiner ZIP

O EPUB arquivo em si: o arquivo ZIP, o arquivo mimetype, nomes e extensões de arquivos.

Código	Severidade padrão	Mensagem
`PKG-001`	Aviso	Validating the EPUB against version … but detected version ….
`PKG-003`	Erro	Unable to read EPUB file header. This is likely a corrupted EPUB file.
`PKG-004`	Erro fatal	Corrupted EPUB ZIP header.
`PKG-005`	Erro	The mimetype file has an extra field of length …. The use of the extra field feature of the ZIP format is not permitted for the mimetype file.
`PKG-006`	Erro	Mimetype file entry is missing or is not the first file in the archive.
`PKG-007`	Erro	The content of the mimetype file must be the string "application/epub+zip"…
`PKG-008`	Erro fatal	Unable to read file "…".
`PKG-009`	Erro	The file name "…" contains characters that are not allowed in OCF file names: ….
`PKG-010`	Aviso	The file name "…" contains spaces, which may create interoperability issues with older reading systems.
`PKG-011`	Erro	The file name "…" is not allowed to end with ".".
`PKG-012`	Uso	The file name "…" contains non-ASCII characters, which might create interoperability issues with older reading systems.
`PKG-013`	Erro	The EPUB file includes multiple OPS renditions.
`PKG-014`	Aviso	The EPUB contains empty directory "…".
`PKG-015`	Erro fatal	Unable to read EPUB contents: …
`PKG-016`	Aviso	Use only lowercase characters for the EPUB file extension for maximum compatibility.
`PKG-017`	Aviso	Uncommon EPUB file extension.
`PKG-018`	Erro fatal	The EPUB file could not be found.
`PKG-020`	Erro	OPF file "…" could not be found.
`PKG-021`	Erro	Corrupted image file encountered.
`PKG-022`	Aviso	Wrong file extension for image. The image is a "…" file but has the file extension "…".
`PKG-023`	Uso	Validating the EPUB against version 2.0, default validation profile will be used.
`PKG-024`	Uso	Uncommon EPUB file extension.
`PKG-025`	Erro	Publication resource must not be located in the META-INF directory
`PKG-026`	Erro	Obfuscated resource must be a Font Core Media Type (was declared as "…" in "…").
`PKG-027`	Erro fatal	Could not extract EPUB ZIP content, probably due to file names not encoded in UTF-8.

RSC: Recursos e referências

Arquivos e links entre eles: arquivos ausentes, referências quebradas, URLs, codificações e análise XML.

Código	Severidade padrão	Mensagem
`RSC-001`	Erro	File "…" could not be found.
`RSC-002`	Erro fatal	Required META-INF/container.xml resource could not be found.
`RSC-003`	Erro	No rootfile tag with media type "application/oebps-package+xml" was found in the container.
`RSC-004`	Informações	File "…" is encrypted, its content will not be checked.
`RSC-005`	Erro	Error while parsing file: …
`RSC-006`	Erro	Remote resource reference is not allowed in this context; resource "…" must be located in the EPUB container.
`RSC-006b`	Uso	Resource "…" is located outside the EPUB Container; please check the resource is retrieved in scripted content.
`RSC-007`	Erro	Referenced resource "…" could not be found in the EPUB.
`RSC-007w`	Aviso	Referenced resource "…" could not be found in the EPUB.
`RSC-008`	Erro	Referenced resource "…" is not declared in the OPF manifest.
`RSC-009`	Aviso	A non-SVG image resource should not be defined with a fragment identifier.
`RSC-010`	Erro	Reference to non-standard resource type found.
`RSC-011`	Erro	Found a reference to a resource that is not a spine item.
`RSC-012`	Erro	Fragment identifier is not defined.
`RSC-013`	Uso	Fragment identifier is used in a reference to a stylesheet resource.
`RSC-014`	Uso	Fragment identifier defines an incompatible resource type.
`RSC-015`	Uso	A fragment identifier is required for svg use tag references.
`RSC-016`	Erro fatal	Fatal Error while parsing file: …
`RSC-017`	Aviso	Warning while parsing file: …
`RSC-019`	Aviso	EPUBs with Multiple Renditions should contain a META-INF/metadata.xml file.
`RSC-020`	Erro	"…" is not a valid URL (…)
`RSC-021`	Erro	A Search Key Map Document must point to Content Documents ("…" was not found in the spine).
`RSC-022`	Informações	Cannot check image details (requires Java version 7 or higher).
`RSC-024`	Uso	Informative parsing warning: …
`RSC-025`	Uso	Informative parsing error: …
`RSC-026`	Erro	URL "…" leaks outside the container (it is not a valid-relative-ocf-URL-with-fragment string)
`RSC-027`	Aviso	XML document is encoded in UTF-16. It should be encoded in UTF-8 instead.
`RSC-028`	Erro	XML documents must be encoded in UTF-8, but … was detected.
`RSC-029`	Erro	Data URL is not allowed in this context.
`RSC-030`	Erro	File URLs are not allowed in EPUB, but found "…".
`RSC-031`	Aviso	Remote resource references should use HTTPS, but found "…".
`RSC-032`	Erro	Fallback must be provided for foreign resources, but found none for resource "…" of type "…".
`RSC-033`	Erro	Relative URL strings must not have a query component, but found one in "…".
`RSC-034`	Erro	Scripts must have a JavaScript media type.
`RSC-035`	Uso	"…" is a legacy media type for JavaScript. Consider using 'text/javascript' instead.
`RSC-036`	Uso	…

OPF: Documento do pacote (OPF)

O documento de pacote: metadados, manifesto, spine, propriedades e soluções alternativas.

Código	Severidade padrão	Mensagem
`OPF-001`	Erro	There was an error when parsing the EPUB version: ….
`OPF-002`	Erro fatal	The OPF file "…" was not found in the EPUB.
`OPF-003`	Uso	Item "…" exists in the EPUB, but is not declared in the OPF manifest.
`OPF-004`	Aviso	Invalid prefix declaration: leading or trailing whitespace is not allowed.
`OPF-004a`	Erro	Invalid prefix declaration: found empty prefix.
`OPF-004b`	Erro	Invalid prefix "…": must be a valid non-colonized name (aka "NCName").
`OPF-004c`	Erro	Invalid prefix declaration: prefix "…" must be immediately followed by a colon character (":").
`OPF-004d`	Erro	Invalid prefix declaration: prefix "…" must be separated by its URI with a space.
`OPF-004e`	Aviso	Invalid prefix declaration: found illegal whitespace between prefix and URI.
`OPF-004f`	Aviso	Invalid prefix declaration: found illegal whitespace between prefix mappings.
`OPF-005`	Erro	Invalid prefix declaration: URI for prefix "…" doesn’t exist.
`OPF-006`	Erro	Invalid prefix declaration: URI "…" is not a valid URI.
`OPF-007`	Aviso	Re-declaration of reserved prefix "…".
`OPF-007a`	Erro	Invalid prefix mapping: prefix "_" must not be declared.
`OPF-007b`	Erro	Invalid prefix mapping: default vocabulary "…" must not be re-declared.
`OPF-007c`	Erro	Invalid prefix mapping: a prefix to the Dublin Core /elements/1.1/ namespace must not be declared
`OPF-010`	Erro	Error resolving reference: "…".
`OPF-011`	Erro	itemref can’t have both page-spread-right and page-spread-left properties.
`OPF-012`	Erro	Item property "…" is not defined for media type "…".
`OPF-013`	Aviso	Resource "…" is declared with MIME type "…" in content, but has MIME type "…" in the package document.
`OPF-014`	Erro	The property "…" should be declared in the OPF file.
`OPF-015`	Erro	The property "…" should not be declared in the OPF file.
`OPF-016`	Erro	The element "rootfile" is missing its required attribute "full-path".
`OPF-017`	Erro	The attribute "full-path" on element "rootfile" must not be empty.
`OPF-018`	Aviso	The "remote-resources" property was declared in the Package Document, but no reference to remote resources has been found.
`OPF-018b`	Uso	The "remote-resources" property was declared in the Package Document, but no reference to remote resources has been found; please check scripted content to make sure the property is legit.
`OPF-021`	Aviso	Use of non-registered URI scheme type in href: "…".
`OPF-025`	Erro	Property value list "…" is not allowed, only one value must be specified.
`OPF-026`	Erro	Found malformed property value: "…".
`OPF-027`	Erro	Undefined property: "…".
`OPF-028`	Erro	Undeclared prefix: "…".
`OPF-029`	Erro	The file "…" does not appear to match the media type …, as specified in the OPF file.
`OPF-030`	Erro	The unique-identifier "…" was not found.
`OPF-031`	Erro	File listed in reference element in guide was not declared in OPF manifest: ….
`OPF-032`	Erro	Guide references "…" which is not a valid "OPS Content Document".
`OPF-033`	Erro	The spine contains no linear resources.
`OPF-034`	Erro	The spine contains multiple references to the manifest item with id "…".
`OPF-035`	Aviso	Media type "text/html" is not appropriate for XHTML/OPS.
`OPF-036`	Uso	Video type "…" might not be supported by reading systems
`OPF-037`	Aviso	Found deprecated media-type "…".
`OPF-038`	Aviso	Media type "…" is not appropriate for an OEBPS 1.2 context; Use "text/x-oeb1-document" instead.
`OPF-039`	Aviso	Media-type "…" is not appropriate in an OEBPS 1.2 context. Use "text/x-oeb1-css" instead.
`OPF-040`	Erro	Fallback item with id "…" could not be found.
`OPF-041`	Erro	Fallback-style item with id "…" could not be found.
`OPF-042`	Erro	"…" is not a permissible spine media-type.
`OPF-043`	Erro	Spine item with non-standard media-type "…" has no fallback.
`OPF-044`	Erro	Spine item with non-standard media-type "…" has no EPUB content document fallback.
`OPF-045`	Erro	Encountered circular reference in fallback chain.
`OPF-047`	Uso	OPF file is using OEBPS 1.2 syntax allowing backwards compatibility.
`OPF-048`	Erro	Package tag is missing its required unique-identifier attribute and value.
`OPF-049`	Erro	Item id "…" was not found in the manifest.
`OPF-050`	Erro	TOC attribute references resource with non-NCX mime type; "application/x-dtbncx+xml" is expected.
`OPF-051`	Suprimido	Image dimensions exceed recommended size.
`OPF-052`	Erro	Role value "…" is not valid.
`OPF-053`	Aviso	Date value "…" does not follow recommended syntax as per http://www.w3.org/TR/NOTE-datetime:….
`OPF-054`	Erro	Date value "…" is not valid as per http://www.w3.org/TR/NOTE-datetime:….
`OPF-055`	Aviso	… tag is empty.
`OPF-057`	Suprimido	Image file length exceeds recommended size.
`OPF-060`	Erro	Duplicate entry in the ZIP file: "…" (file names must be unique after Unicode canonical normalization and full case folding).
`OPF-062`	Uso	Found Adobe page-map attribute on spine element in opf file.
`OPF-063`	Aviso	Referenced Adobe page-map item "…" was not found in the manifest.
`OPF-064`	Informações	OPF declares type "…", validating using profile "…".
`OPF-065`	Erro	Invalid metadata declaration, probably due to a cycle in "refines" metadata.
`OPF-066`	Erro	Missing "dc:source" or "source-of" pagination metadata. The pagination source must be identified using the "dc:source" and "source-of" properties when the content includes page break markers.
`OPF-067`	Erro	The resource "…" must not be listed both as a "link" element in the package metadata and as a manifest item.
`OPF-070`	Aviso	Custom collection role "…" is an invalid URL.
`OPF-071`	Erro	Index collections must only contain resources pointing to XHTML Content Documents.
`OPF-072`	Uso	Metadata element "…" is empty.
`OPF-073`	Erro	External identifiers must not appear in the document type declaration.
`OPF-074`	Erro	Package resource "…" is declared in several manifest items.
`OPF-075`	Erro	Preview collections must only point to EPUB Content Documents.
`OPF-076`	Erro	The URI of preview collections link elements must not include EPUB canonical fragment identifiers.
`OPF-077`	Aviso	A Data Navigation Document should not be included in the spine.
`OPF-078`	Erro	An EPUB Dictionary must contain at least one Content Document with dictionary content (epub:type "dictionary").
`OPF-079`	Aviso	Dictionary content was found (epub:type "dictionary"), the Package Document should declare the dc:type "dictionary".
`OPF-080`	Aviso	A Search Key Map document file name should have the extension ".xml".
`OPF-081`	Erro	Resource "…" (referenced from an EPUB Dictionary collection) was not found.
`OPF-082`	Erro	Found an EPUB Dictionary collection containing more than one Search Key Map Document.
`OPF-083`	Erro	Found an EPUB Dictionary collection containing no Search Key Map Document.
`OPF-084`	Erro	Found an EPUB Dictionary collection containing resource "…" which is neither a Search Key Map Document nor an XHTML Content Document.
`OPF-085`	Aviso	"dc:identifier" value "…" is marked as a UUID, but is an invalid UUID.
`OPF-086`	Aviso	Property "…" is deprecated. Consider using … instead.
`OPF-086b`	Uso	epub:type value "…" is deprecated. Consider using … instead.
`OPF-086c`	Aviso	the "…" reserved prefix is deprecated.
`OPF-087`	Uso	epub:type value "…" is not allowed on documents of type "…".
`OPF-088`	Uso	Unrecognized epub:type value "…".
`OPF-089`	Erro	The "alternate" link rel keyword cannot be paired with other keywords.
`OPF-090`	Uso	It is encouraged to use MIME media type "…" instead of "…".
`OPF-091`	Erro	The item href URL must not have a fragment identifier.
`OPF-092`	Erro	Language tag "…" is not well-formed: …
`OPF-093`	Erro	The "media-type" attribute is required for linked resources located in the EPUB container
`OPF-094`	Erro	The "media-type" attribute is required for "…" links.
`OPF-095`	Erro	The "media-type" attribute of "voicing" links must be an audio MIME type, but found "…".
`OPF-096`	Erro	Non-linear content must be reachable, but found no hyperlink to "…".
`OPF-096b`	Uso	No hyperlink was found to non-linear document "…", please check that it can be reached from scripted content.
`OPF-097`	Uso	Resource "…" is listed in the manifest, but no reference to it was found in content documents.
`OPF-098`	Erro	The "href" attribute must reference resources, not elements in the package document, but found URL "…".
`OPF-099`	Erro	The manifest must not list the package document.
`OPF-100`	Uso	The "…" property only applies to pre-paginated content.

HTM: documentos XHTML

Os capítulos do XHTML: DOCTYPE, entidades, namespaces e viewports de layout fixo.

Código	Severidade padrão	Mensagem
`HTM-001`	Erro	Any publication resource that is an XML-based media type must be a valid XML 1.0 document. XML version found: ….
`HTM-002`	Aviso	The installed xml parser doesn’t support xml version verification. Xml files must be a valid XML 1.0 document.
`HTM-003`	Erro	External entities are not allowed in EPUB v3 documents. External entity declaration found: ….
`HTM-004`	Erro	Irregular DOCTYPE: found "…", expected "…".
`HTM-005`	Uso	An external reference was found.
`HTM-007`	Aviso	Empty or whitespace-only value of attribute ssml:ph.
`HTM-009`	Erro	The DOCTYPE provided is obsolete or irregular and can be removed.
`HTM-010`	Uso	Namespace "…" is unusual for the prefix "epub".
`HTM-011`	Erro	Entity is undeclared.
`HTM-025`	Aviso	Non-registered URI scheme type found in href.
`HTM-044`	Uso	Namespace uri "…" was included but not used.
`HTM-045`	Uso	Encountered empty href.
`HTM-046`	Erro	Fixed layout document has no "viewport" meta element.
`HTM-047`	Erro	Viewport metadata "…" has a syntax error
`HTM-048`	Erro	SVG Fixed-Layout Documents must have a "viewBox" attribute (on the outermost "svg" element).
`HTM-051`	Aviso	Found Microdata semantic enrichments but no RDFa. EDUPUB recommends using RDFa Lite.
`HTM-052`	Erro	The property "region-based" is only allowed on nav elements in Data Navigation Documents.
`HTM_054`	Erro	Custom attribute namespace ("…") must not include the string "…" in its domain.
`HTM_055`	Uso	The "…" element should not be used (discouraged construct)
`HTM_056`	Erro	Viewport metadata has no "…" dimension (both "width" and "height" properties are required)
`HTM_057`	Erro	Viewport "…" value must be a positive number or the keyword "device-…"
`HTM_058`	Erro	HTML documents must be encoded in UTF-8, but UTF-16 was detected.
`HTM_059`	Erro	Viewport "…" property must not be defined more than once, but found values […].
`HTM_060a`	Uso	EPUB reading systems must ignore secondary viewport meta elements in fixed-layout documents; viewport declaration "…" will be ignored.
`HTM_060b`	Uso	EPUB reading systems must ignore viewport meta elements in reflowable documents; viewport declaration "…" will be ignored.
`HTM_061`	Erro	"…" is not a valid custom data attribute (it must have at least one character after the hyphen, be XML-compatible, and not contain ASCII uppercase letters).
`HTM_062`	Uso	SVG "xlink:href" attribute is deprecated; an "href" attribute should be used instead.
`HTM_063`	Uso	SVG "xlink:href" attribute value ("…") should be equal to the "href" attribute value ("…").

CSS: Folhas de estilo

Arquivos CSS e elementos de estilo: propriedades proibidas, codificações, fontes e sintaxe.

Código	Severidade padrão	Mensagem
`CSS-001`	Erro	The "…" property must not be included in an EPUB Style Sheet.
`CSS-002`	Erro	Empty or NULL reference found.
`CSS-003`	Aviso	CSS document is encoded in UTF-16. It should be encoded in UTF-8 instead.
`CSS-004`	Erro	CSS documents must be encoded in UTF-8, detected …;
`CSS-005`	Uso	Conflicting alternate style tags found: ….
`CSS-006`	Uso	CSS selector specifies fixed position.
`CSS-007`	Informações	Font-face reference "…" refers to non-standard font type "…".
`CSS-008`	Erro	An error occurred while parsing the CSS: ….
`CSS-015`	Erro	Alternative style sheets must have a title.
`CSS-019`	Aviso	CSS font-face declaration has no attributes.
`CSS-028`	Uso	Use of Font-face declaration.
`CSS-029`	Uso	Found CSS class name "…" but no "…" property was declared in the package document.
`CSS-030`	Erro	The package document declares media overlays styling class names but no CSS was found in the content document.

NAV: Documento de navegação

O EPUB 3 índice, a lista de páginas e os marcos.

Código	Severidade padrão	Mensagem
`NAV-001`	Erro	The nav file is not supported for EPUB v2.
`NAV-003`	Erro	The Navigation Document must have a page list when content document(s) contain page breaks (epub:type="pagebreak").
`NAV-004`	Uso	The Navigation Document should contain the full document heading hierarchy in EDUPUB.
`NAV-005`	Uso	Content documents contain "audio" elements but the Navigation Document does not have a listing of audio clips (epub:type="loa").
`NAV-006`	Uso	Content documents contain "figure" elements but the Navigation Document does not have a listing of figures (epub:type="loi").
`NAV-007`	Uso	Content documents contain "table" elements but the Navigation Document does not have a listing of tables (epub:type="lot").
`NAV-008`	Uso	Content documents contain "video" elements but the Navigation Document does not have a listing of video clips (epub:type="lov").
`NAV-009`	Erro	Region-based navigation links must point to Fixed-Layout Documents.
`NAV-010`	Erro	"…" nav must not link to remote resources; found link to "…".
`NAV-011`	Aviso	"…" nav must be in reading order; link target "…" is before the previous link’s target in … order.

NCX: NCX (EPUB 2 tabela de conteúdos)

A tabela de conteúdo NCX legada.

Código	Severidade padrão	Mensagem
`NCX-001`	Erro	NCX identifier ("…") does not match OPF identifier ("…").
`NCX-004`	Uso	NCX identifier ("dtb:uid" metadata) should not contain leading or trailing whitespace.
`NCX-006`	Uso	Empty "text" label in the NCX document

MED: Imagens, áudio e sobreposições de mídia

Formatos de imagem e cabeçalhos, e áudio sincronizado (sobreposições de mídia).

Código	Severidade padrão	Mensagem
`MED-003`	Erro	Picture "img" elements must reference core media type resources, but found resource "…" of type "…".
`MED-004`	Erro	Image file header may be corrupted.
`MED-005`	Erro	Media Overlay audio reference … to non-standard audio type … found.
`MED-008`	Erro	The time specified in the clipBegin attribute must not be after clipEnd.
`MED-009`	Erro	The time specified in the clipBegin attribute must not be the same as clipEnd.
`MED_007`	Erro	Picture "source" elements must define a "type" attribute when they reference foreign resources; found resource "…" of type "…".
`MED_010`	Erro	EPUB Content Documents referenced from a Media Overlay must specify the "media-overlay" attribute.
`MED_011`	Erro	EPUB Content Document referenced from multiple Media Overlay Documents.
`MED_012`	Erro	The "media-overlay" attribute does not match the ID of the Media Overlay that refers to this document.
`MED_013`	Erro	Media Overlay Document referenced from the "media-overlay" attribute does not contain a reference to this Content Document.
`MED_014`	Erro	Media overlay audio file URLs must not have a fragment, but found '#…'.
`MED_015`	Uso	Media overlay text references must be in reading order. Text target "…" is before the previous link target in … order.
`MED_016`	Aviso	Media Overlays total duration should be the sum of the durations of all Media Overlays documents.
`MED_017`	Aviso	URL fragment should indicate an element ID, but found '#…'.
`MED_018`	Aviso	URL fragment should be an SVG fragment identifier, but found '#…'.

ACC: Acessibilidade

Verificações de acessibilidade em documentos de conteúdo (a maioria está suprimida por padrão).

Código	Severidade padrão	Mensagem
`ACC-004`	Suprimido	Html "a" element must have text.
`ACC-005`	Suprimido	Table heading cells should be identified by "th" elements for accessibility.
`ACC-006`	Suprimido	Tables should include a "thead" element for accessibility.
`ACC-007`	Suprimido	Content Documents do not use "epub:type" attributes for semantic inflection.
`ACC-009`	Uso	MathML should either have an "alttext" attribute or "annotation-xml" child element.
`ACC-011`	Uso	SVG hyperlink has no accessible name
`ACC-012`	Suprimido	Table elements should include a caption element.

OBS: Recursos obsoletos

Recursos que ainda funcionam, mas estão desatualizados.

Código	Severidade padrão	Mensagem
`OBS-001`	Uso	Usage of … is outdated.

INF: Informação

Notas sobre EPUBCheck em si.

Código	Severidade padrão	Mensagem
`INF-001`	Informações	Rule … is under review and its severity may change in a future release. See the discussion at …

CHK: EPUBCheck configuração

Problemas com o próprio arquivo de mensagem personalizada do EPUBCheck, não com o EPUB.

Código	Severidade padrão	Mensagem
`CHK-001`	Erro	The custom message overrides file was not found.
`CHK-002`	Erro	Unrecognized custom message id … encountered in message overrides file "…".
`CHK-003`	Erro	Unrecognized custom message severity "…" encountered in message overrides file "…".
`CHK-004`	Erro	The custom message contains too many parameters in message overrides file "…".
`CHK-005`	Erro	The custom suggestion contains too many parameters in message overrides file "…".
`CHK-006`	Erro	Unable to parse the custom format parameter in message overrides file "…".
`CHK-007`	Erro	Error encountered while processing custom message file "…": "…".
`CHK-008`	Erro	Error encountered while processing an item "…"; skip other checks for the item.

IDs de mensagem aposentados

Esses IDs ainda existem na lista de mensagens do EPUBCheck, mas não têm texto e são suprimidos por padrão, então EPUBCheck nunca os relata, a menos que um arquivo de mensagem personalizado os ative.

ACC-001, ACC-002, ACC-003, ACC-008, ACC-010, ACC-013, ACC-014, ACC-015, ACC-016, ACC-017, CSS-009, CSS-010, CSS-011, CSS-012, CSS-013, CSS-016, CSS-017, CSS-020, CSS-021, CSS-022, CSS-023, CSS-024, CSS-025, HTM-006, HTM-008, HTM-012, HTM-013, HTM-014, HTM-014a, HTM-015, HTM-016, HTM-017, HTM-018, HTM-019, HTM-020, HTM-021, HTM-022, HTM-023, HTM-024, HTM-027, HTM-028, HTM-029, HTM-033, HTM-036, HTM-038, HTM-049, HTM-050, HTM_053, MED-001, MED-002, MED_006, NAV-002, NCX-002, NCX-003, NCX-005, OPF-008, OPF-009, OPF-019, OPF-020, OPF-046, OPF-056, OPF-058, OPF-059, OPF-068, OPF-069, RSC-018, RSC-023, SCP-001, SCP-002, SCP-003, SCP-004, SCP-005, SCP-006, SCP-007, SCP-008, SCP-009, SCP-010

Fonte e licença

Os textos das mensagens e as gravidades padrão vêm de EPUBCheck 5.4.0, o validador EPUB do W3C, lançado sob a licença BSD-3-Clause. Copyright © 2007 Adobe Systems Incorporated. Copyright © 2008 IDPF. Copyright © 2017 W3C (MIT, ERCIM, Keio, Beihang). github.com/w3c/epubcheck

Causas e soluções são escritas por EpubCC. Códigos sem explicação mostram apenas a mensagem oficial e não são oferecidos a mecanismos de busca até que escrevamos uma. EpubCC não é afiliado ao W3C.