Messages
This is the reference documentation for EPUBCheck messages.
Whenever it detects a conformance issue (or other noteworthy information) with your content, EPUBCheck reports a message. A message consists of several pieces of information:
- a severity level indicates if it is a fatal error, an error, a warning, an information, or a usage message. See the severity levels section below for more details.
- a message code is used to uniquely identify the issue among the reference list of possible messages
- a location indicates in which file (possibly with a line and column number) the issue was detected
- a text content describes the reported issue in plain language
§ Severity Levels
The messages reported by EPUBCheck use the following severity level:
- Fatal Error
- An error which prevents EPUBCheck from further processing the content. This may be caused by a bug in EPUBCheck, or an unforeseen condition (like an I/O error).
- Error
- A failure to match an EPUB conformance requirement. In the EPUB specifications, these requirements are identified with “MUST”, “MUST NOT”, or “REQUIRED” keywords.
- Warning
- A deviation from an EPUB recommended practice. In the EPUB specifications, these recommendations are identified with “SHOULD”, “SHOULD NOT”, or “RECOMMENDED” keywords
- Info
- A noteworthy information about your content.
- Usage
- A minor information about your content.
§ Message Codes
| Code | Severity | Message |
|---|---|---|
| ACC_001 | usage | "img" or "area" HTML element has no "alt" attribute.
ExplanationAll meaningful non-text content that is presented to the user should have a textual alternative that describes the content. The "alt" attribute can be used for "img" and "area" HTML elements. |
| ACC_002 | usage | "input" HTML element is not referenced by a corresponding label element.
ExplanationLabels that identify the controls in a form should be used so that users know what input data is expected. |
| ACC_008 | usage | Navigation Document has no "landmarks nav" element.
ExplanationLandmarks are convenient for users to quickly jump from one part of the content to another. Their presence facilitates the use by people with access problems to the content. |
| ACC_009 | usage | MathML should either have an "alttext" attribute or "annotation-xml" child element.
ExplanationAll meaningful non-text content that is presented to the user should have a textual alternative that describes the content. The "alttext" attribute or "annotation-xml" child element can be used for MathML content. |
| ACC_011 | warning | SVG hyperlinks should have a human-readable title (using the "title" child element or the "xlink:title" attribute).
ExplanationVisual interactive content that is presented to the user should have a textual alternative. The "title" child element or the "xlink:title" attribute can be used for SVG links. |
| ACC_013 | usage | Content file contains at least one inline style declaration.
ExplanationInline styles in HTML code almost always overwrite externally linked style sheets, including custom, user-defined style sheets that can help visually impaired people adapt content to their needs (enlarged fonts, color scheme, etc.). For this reason, the use of embedded styles should be avoided. |
| ACC_014 | usage | Value of CSS property "font-size" does not use a relative size: "%1$s"
ExplanationThe use of fixed units of measurement can create problems with some reading solutions when the user changes the font size and line-height settings, making the content unreadable. It is suggested to always use relative units of measure. |
| ACC_015 | usage | Value of CSS property "line-height" does not use a relative size.
ExplanationThe use of fixed units of measurement can create problems with some reading solutions when the user changes the font size and line-height settings, making the content unreadable. It is suggested to always use relative units of measure. |
| ACC_016 | usage | Value of CSS property "font-size" should use a relative size: "%1$s"
ExplanationThe use of fixed units of measurement can create problems with some reading solutions when the user changes the font size and line-height settings, making the content unreadable. It is suggested to always use relative units of measure. |
| ACC_017 | usage | Value of CSS property "line-height" does not use a relative size.
ExplanationThe use of fixed units of measurement can create problems with some reading solutions when the user changes the font size and line-height settings, making the content unreadable. It is suggested to always use relative units of measure. |
| CHK_001 | error | The custom message overrides file was not found. |
| CHK_002 | error | Unrecognized custom message id %1$s encountered in message overrides file "%2$s". |
| CHK_003 | error | Unrecognized custom message severity "%1$s" encountered in message overrides file "%2$s". |
| CHK_004 | error | The custom message contains too many parameters in message overrides file "%1$s". |
| CHK_005 | error | The custom suggestion contains too many parameters in message overrides file "%1$s". |
| CHK_006 | error | Unable to parse the custom format parameter in message overrides file "%1$s". |
| CHK_007 | error | Error encountered while processing custom message file "%1$s": "%2$s". |
| CHK_008 | error | Error encountered while processing an item "%1$s"; skip other checks for the item. |
| CSS_001 | error | The "%1$s" property must not be included in an EPUB Style Sheet.
ExplanationEPUB specifications says authors must not use the direction and unicode-bidi CSS properties. Use the HTML dir attribute to set the inline base direction, use bdo elements and dir attributes to control bidirectionality. |
| CSS_002 | error | Empty or NULL reference found.
ExplanationA reference in the CSS code is empty or null. It could be an unset URL reference, e.g. `url('')` or `url()`. |
| CSS_003 | error | Only UTF-8 and UTF-16 encodings are allowed, detected %1$s.
ExplanationCheck the encoding of the CSS file and transform it into UTF-8 or UTF-16 if necessary. |
| CSS_004 | error | Only UTF-8 and UTF-16 encodings are allowed, detected %1$s BOM.
ExplanationCheck the encoding of the CSS file and transform it into UTF-8 or UTF-16 if necessary. |
| CSS_005 | error | Conflicting alternate style attributes found: %1$s. |
| CSS_006 | usage | CSS selector specifies fixed position. |
| CSS_007 | info | Font-face reference "%1$s" refers to non-standard font type "%2$s".
ExplanationFont core-types are "TrueType", "OpenType", "WOFF" and "WOFF2" |
| CSS_008 | error | An error occurred while parsing the CSS: %1$s.
ExplanationThe file seems to have some problems that prevent it from being read or parsed. |
| CSS_009 | usage | Use of certain CSS such as Columns, Transforms, Transitions, box-sizing or KeyFrames can cause pagination issues. |
| CSS_010 | error | Stylesheet of type other than "text/css" must have a fallback.
ExplanationFor other types of style sheets other than CSS (e.g. XPGT), a CSS fallback must be provided. |
| CSS_012 | usage | Document links to multiple CSS files. |
| CSS_013 | usage | CSS property is declared !Important. |
| CSS_015 | error | Alternate Stylesheet has no title.
ExplanationAlternative style sheets must have a title to be identified. |
| CSS_017 | usage | CSS selector specifies absolute position. |
| CSS_019 | warning | CSS font-face declaration has no attributes.
ExplanationThe declaration `@font-face` should contain at least the descriptors `font-family` and `src`. |
| CSS_020 | error | CSS font selector declaration uses unexpected font-size value "%1$s". |
| CSS_021 | usage | Shorthand CSS property "font-family" specifies an invalid System Font. |
| CSS_022 | usage | CSS selector specifies global margin setting. |
| CSS_023 | usage | CSS selector specifies media query. |
| CSS_024 | usage | CSS class Selector is not used. |
| CSS_025 | usage | CSS class Selector could not be found. |
| CSS_028 | usage | Use of Font-face declaration. |
| HTM_001 | error | Any publication resource that is an XML-based media type must be a valid XML 1.0 document. XML version found: %1$s. |
| HTM_002 | warning | The installed xml parser doesn’t support xml version verification. Xml files must be a valid XML 1.0 document. |
| HTM_003 | error | External entities are not allowed in EPUB v3 documents. External entity declaration found: %1$s. |
| HTM_004 | error | Irregular DOCTYPE: found "%1$s", expected "%2$s". |
| HTM_005 | usage | An external reference was found. |
| HTM_006 | usage | An XHTML Named Entity was found. |
| HTM_007 | warning | Empty or whitespace-only value of attribute ssml:ph. |
| HTM_008 | error | The src attribute is required. |
| HTM_009 | error | The DOCTYPE provided is obsolete or irregular and can be removed. |
| HTM_010 | usage | Namespace uri "%1$s" was found. |
| HTM_011 | error | Entity is undeclared. |
| HTM_012 | usage | Found a link to a CFI in an external book. |
| HTM_013 | usage | Intra-Publication CFIs found in document. |
| HTM_014 | warning | Invalid file extension for HTML file, expecting (html, htm or xhtml). |
| HTM_014a | warning | XHTML Content Document file name "%1$s" should have the extension ".xhtml". |
| HTM_017 | error | Content file has different language value in attributes xml:lang and lang. |
| HTM_018 | usage | Content file has invalid language value at attribute xml:lang. |
| HTM_019 | usage | Content file has invalid language definition at attribute lang. |
| HTM_020 | usage | Content file doesn’t contain xml:lang attribute. |
| HTM_021 | usage | Content file doesn’t contain lang attribute. |
| HTM_022 | usage | Document may contain excessive DIV or SPAN tags. |
| HTM_025 | warning | Non-registered URI scheme type found in href. |
| HTM_027 | usage | List contains less than 2 items. |
| HTM_028 | usage | Input html elements should include an id. |
| HTM_029 | usage | Label html elements should include a "for" attribute referencing the id of an input element. |
| HTM_033 | usage | HTML "head" element does not have a "title" child element. |
| HTM_044 | usage | Namespace uri "%1$s" was included but not used. |
| HTM_045 | usage | Encountered empty href. |
| HTM_046 | error | Fixed format item has no viewport defined. |
| HTM_047 | error | Html viewport is missing height and/or width. |
| HTM_048 | error | SVG Fixed-Layout Documents must have a "viewBox" attribute (on the outermost "svg" element). |
| HTM_049 | error | Html element does not have an xmlns set to "http://www.w3.org/1999/xhtml". |
| HTM_050 | usage | Found epub:type="pagebreak" attribute in content document. |
| HTM_051 | warning | Found Microdata semantic enrichments but no RDFa. EDUPUB recommends using RDFa Lite. |
| HTM_052 | error | The property "region-based" is only allowed on nav elements in Data Navigation Documents. |
| HTM_053 | info | Found an external file link (file://) in file: "%1$s". |
| INF_001 | info | The previous rule is under review and its severity may change in a future release. See the discussion at %1$s |
| MED_001 | error | Video poster must have core media image type.
ExplanationEPUB specifications require all reading solutions to support certain image formats. A file in this format must be used as a poster frame for videos. |
| MED_002 | error | %1$s element doesn’t provide fallback.
ExplanationAll resources that are not in the formats listed among the Core Media Types must have a fallback in a Core Media Types format, in order to allow content to be enjoyed in all reading solutions (even those with a minimum media type support). |
| MED_003 | error | A manifest fallback must be provided for image resource "%1$s" of type "%2$s".
ExplanationThe image is not in a Core Media Types format, so a fallback image in a Core Media Types format is required. |
| MED_004 | error | Image file header may be corrupted.
ExplanationThe file looks corrupted, try opening it with an image viewer and replace it if necessary. |
| MED_005 | error | Media Overlay audio reference %1$s to non-standard audio type %2$s found.
ExplanationMedia Overlay resources can only be in one of the audio formats provided in the Core Media Types. |
| MED_006 | usage | Some browsers do not support rendering SVG images which use a filename in the xlink:href property. |
| MED_007 | error | Foreign resources can only be referenced from "source" elements with an explicit "type" attribute; found resource "%1$s" of foreign type "%2$s". |
| NAV_001 | error | The nav file is not supported for EPUB v2.
ExplanationThe EPUB 2 format does not support the nav file; to define the Content Table and PageList use the NCX file, for landmarks use the <guide> element in the OPF file. |
| NAV_002 | usage | Found epub:type="page-list" in nav document |
| NAV_003 | error | The Navigation Document must have a page list when content document(s) contain page breaks (epub:type="pagebreak").
ExplanationPage breaks identify the points at which the paper pages of the document are interrupted. For this reason, if they are present, it is necessary to indicate the page number in the nav page list element. |
| NAV_004 | usage | The Navigation Document should contain the full document heading hierarchy in EDUPUB. |
| NAV_005 | usage | Content documents contain "audio" elements but the Navigation Document does not have a listing of audio clips (epub:type="loa"). |
| NAV_006 | usage | Content documents contain "figure" elements but the Navigation Document does not have a listing of figures (epub:type="loi"). |
| NAV_007 | usage | Content documents contain "table" elements but the Navigation Document does not have a listing of tables (epub:type="lot"). |
| NAV_008 | usage | Content documents contain "video" elements but the Navigation Document does not have a listing of video clips (epub:type="lov"). |
| NAV_009 | error | Region-based navigation links must point to Fixed-Layout Documents. |
| NAV_010 | error | "%1$s" nav must not link to remote resources; found link to "%2$s". |
| NAV_011 | warning | "%1$s" nav must be in reading order; link target "%2$s" is before the previous link’s target in %3$s order. |
| NCX_001 | error | NCX identifier ("%1$s") does not match OPF identifier ("%2$s").
ExplanationBoth fields should have the same value, i.e. the unique identifier of the publication. |
| NCX_002 | error | toc attribute was not found on the spine element.
ExplanationIn the OPF file, the id of the TOC element (i.e. NCX file) must be present as the value of the attribute "toc" of the element "spine". |
| NCX_003 | usage | An .NCX file is required for TOC navigation on EPUB v2 readers. |
| NCX_004 | usage | NCX identifier ("dtb:uid" metadata) should not contain leading or trailing whitespace. |
| NCX_005 | usage | Found ncx "page-list" in .ncx file |
| NCX_006 | usage | Empty "text" label in the NCX document |
| OPF_001 | error | There was an error when parsing the EPUB version: %1$s. |
| OPF_002 | fatal | The OPF file "%1$s" was not found in the EPUB. |
| OPF_003 | warning | Item "%1$s" exists in the EPUB, but is not declared in the OPF manifest. |
| OPF_004 | warning | Invalid prefix declaration: leading or trailing whitespace is not allowed. |
| OPF_004a | error | Invalid prefix declaration: found empty prefix. |
| OPF_004b | error | Invalid prefix "%1$s": must be a valid non-colonized name (aka "NCName"). |
| OPF_004c | error | Invalid prefix declaration: prefix "%1$s" must be immediately followed by a colon character (":"). |
| OPF_004d | error | Invalid prefix declaration: prefix "%1$s" must be separated by its URI with a space. |
| OPF_004e | warning | Invalid prefix declaration: found illegal whitespace between prefix and URI. |
| OPF_004f | warning | Invalid prefix declaration: found illegal whitespace between prefix mappings. |
| OPF_005 | error | Invalid prefix declaration: URI for prefix "%1$s" doesn’t exist. |
| OPF_006 | error | Invalid prefix declaration: URI "%1$s" is not a valid URI. |
| OPF_007 | warning | Re-declaration of reserved prefix "%1$s". |
| OPF_007a | error | Invalid prefix mapping: prefix "_" must not be declared. |
| OPF_007b | warning | Invalid prefix mapping: default vocabulary "%1$s" must not be re-declared. |
| OPF_008 | error | Handler binding for core Media-type "%1$s" is not allowed. |
| OPF_009 | error | The media-type "%1$s" has already been assigned a handler, with ID "%2$s". |
| OPF_010 | error | Error resolving reference: "%1$s". |
| OPF_011 | error | itemref can’t have both page-spread-right and page-spread-left properties. |
| OPF_012 | error | Item property "%1$s" is not defined for media type "%2$s". |
| OPF_013 | error | The type property "%1$s" on the object tag does not match the declared media-type "%2$s" in the OPF manifest. |
| OPF_014 | error | The property "%1$s" should be declared in the OPF file. |
| OPF_015 | error | The property "%1$s" should not be declared in the OPF file. |
| OPF_016 | error | The element "rootfile" is missing its required attribute "full-path". |
| OPF_017 | error | The attribute "full-path" on element "rootfile" must not be empty. |
| OPF_018 | warning | The "remote-resources" property was declared in the Package Document, but no reference to remote resources has been found. |
| OPF_018b | usage | The "remote-resources" property was declared in the Package Document, but no reference to remote resources has been found; please check scripted content to make sure the property is legit. |
| OPF_019 | fatal | Spine tag was not found in the OPF file. |
| OPF_021 | warning | Use of non-registered URI scheme type in href: "%1$s". |
| OPF_025 | error | Property value list "%1$s" is not allowed, only one value must be specified. |
| OPF_026 | error | Found malformed property value: "%1$s". |
| OPF_027 | error | Undefined property: "%1$s". |
| OPF_028 | error | Undeclared prefix: "%1$s". |
| OPF_029 | error | The file "%1$s" does not appear to match the media type %2$s, as specified in the OPF file. |
| OPF_030 | error | The unique-identifier "%1$s" was not found. |
| OPF_031 | error | File listed in reference element in guide was not declared in OPF manifest: %1$s. |
| OPF_032 | error | Guide references "%1$s" which is not a valid "OPS Content Document". |
| OPF_033 | error | The spine contains no linear resources. |
| OPF_034 | error | The spine contains multiple references to the manifest item with id "%1$s". |
| OPF_035 | warning | Media type "text/html" is not appropriate for XHTML/OPS. |
| OPF_036 | usage | Video type "%1$s" might not be supported by reading systems |
| OPF_037 | warning | Found deprecated media-type "%1$s". |
| OPF_038 | warning | Media type "%1$s" is not appropriate for an OEBPS 1.2 context; Use "text/x-oeb1-document" instead. |
| OPF_039 | warning | Media-type "%1$s" is not appropriate in an OEBPS 1.2 context. Use "text/x-oeb1-css" instead. |
| OPF_040 | error | Fallback item could not be found. |
| OPF_041 | error | Fallback-style item could not be found. |
| OPF_042 | error | %1$s" is not a permissible spine media-type. |
| OPF_043 | error | Spine item with non-standard media-type "%1$s" has no fallback. |
| OPF_044 | error | Spine item with non-standard media-type "%1$s" has a fallback to non-standard media-type. |
| OPF_045 | error | Encountered circular reference in fallback chain. |
| OPF_046 | error | Scripted property is not set on mediaType handler. |
| OPF_047 | usage | OPF file is using OEBPS 1.2 syntax allowing backwards compatibility. |
| OPF_048 | error | Package tag is missing its required unique-identifier attribute and value. |
| OPF_049 | error | Item id "%1$s" was not found in the manifest. |
| OPF_050 | error | TOC attribute references resource with non-NCX mime type; "application/x-dtbncx+xml" is expected. |
| OPF_052 | error | Role value "%1$s" is not valid. |
| OPF_053 | warning | Date value "%1$s" does not follow recommended syntax as per http://www.w3.org/TR/NOTE-datetime:%2$s. |
| OPF_054 | error | Date value "%1$s" is not valid as per http://www.w3.org/TR/NOTE-datetime:%2$s. |
| OPF_055 | warning | %1$s tag is empty. |
| OPF_056 | usage | Media type "%1$s" is not a core audio type. |
| OPF_058 | usage | Spine item "%1$s" is not referenced from the TOC in the Nav Doc. |
| OPF_059 | usage | Spine item "%1$s" is not referenced from the TOC in the NCX. |
| OPF_060 | error | Duplicate entry in the ZIP file: "%1$s". |
| OPF_061 | warning | Duplicate entry in the ZIP file (after Unicode NFC normalization) "%1$s". |
| OPF_062 | usage | Found Adobe page-map attribute on spine element in opf file. |
| OPF_063 | warning | Referenced Adobe page-map item "%1$s" was not found in the manifest. |
| OPF_064 | info | OPF declares type "%1$s", validating using profile "%2$s". |
| OPF_065 | error | Invalid metadata declaration, probably due to a cycle in "refines" metadata. |
| OPF_066 | error | 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 | error | The resource "%1$s" must not be listed both as a "link" element in the package metadata and as a manifest item. |
| OPF_068 | error | Unknown collection role "%1$s". |
| OPF_069 | error | Custom collection role URI "%1$s" must not include the string "idpf.org" in its host component. |
| OPF_070 | warning | Custom collection role "%1$s" is an invalid URI. |
| OPF_071 | error | Index collections must only contain resources pointing to XHTML Content Documents. |
| OPF_072 | usage | Metadata element "%1$s" is empty. |
| OPF_073 | error | External identifiers must not appear in the document type declaration. |
| OPF_074 | error | Package resource "%1$s" is declared in several manifest item. |
| OPF_075 | error | Preview collections must only point to EPUB Content Documents. |
| OPF_076 | error | The URI of preview collections link elements must not include EPUB canonical fragment identifiers. |
| OPF_077 | warning | A Data Navigation Document should not be included in the spine. |
| OPF_078 | error | An EPUB Dictionary must contain at least one Content Document with dictionary content (epub:type "dictionary"). |
| OPF_079 | warning | Dictionary content was found (epub:type "dictionary"), the Package Document should declare the dc:type "dictionary". |
| OPF_080 | warning | A Search Key Map document file name should have the extension ".xml". |
| OPF_081 | error | Resource "%1$s" (referenced from an EPUB Dictionary collection) was not found. |
| OPF_082 | error | Found an EPUB Dictionary collection containing more than one Search Key Map Document. |
| OPF_083 | error | Found an EPUB Dictionary collection containing no Search Key Map Document. |
| OPF_084 | error | Found an EPUB Dictionary collection containing resource "%1$s" which is neither a Search Key Map Document nor an XHTML Content Document. |
| OPF_085 | warning | dc:identifier" value "%1$s" is marked as a UUID, but is an invalid UUID. |
| OPF_086 | warning | Property "%1$s" is deprecated. Consider using %2$s instead. |
| OPF_086b | usage | epub:type value "%1$s" is deprecated. Consider using %2$s instead. |
| OPF_087 | usage | epub:type value "%1$s" is not allowed on documents of type "%2$s". |
| OPF_088 | usage | Unrecognized epub:type value "%1$s". |
| OPF_089 | error | The "alternate" link rel keyword cannot be paired with other keywords. |
| OPF_090 | usage | It is encouraged to use MIME media type "%1$s" instead of "%2$s". |
| PKG_001 | warning | Validating the EPUB against version %1$s but detected version %2$s. |
| PKG_003 | error | Unable to read EPUB file header. This is likely a corrupted EPUB file. |
| PKG_004 | fatal | Corrupted EPUB ZIP header. |
| PKG_005 | error | The mimetype file has an extra field of length %1$s. The use of the extra field feature of the ZIP format is not permitted for the mimetype file. |
| PKG_006 | error | Mimetype file entry is missing or is not the first file in the archive. |
| PKG_007 | error | Mimetype file should only contain the string "application/epub+zip" and should not be compressed. |
| PKG_008 | fatal | Unable to read file "%1$s". |
| PKG_009 | error | File name contains characters that are not allowed in OCF file names: "%1$s". |
| PKG_010 | warning | Filename contains spaces, therefore URI escaping is necessary. Consider removing spaces from filename. |
| PKG_011 | error | Filename is not allowed to end with ".". |
| PKG_012 | usage | File name contains the following non-ascii characters: %1$s. Consider changing the filename. |
| PKG_013 | error | The EPUB file includes multiple OPS renditions. |
| PKG_014 | warning | The EPUB contains empty directory "%1$s". |
| PKG_015 | fatal | Unable to read EPUB contents: %1$s |
| PKG_016 | warning | Use only lowercase characters for the EPUB file extension for maximum compatibility. |
| PKG_017 | warning | Uncommon EPUB file extension. |
| PKG_018 | fatal | The EPUB file could not be found. |
| PKG_020 | error | OPF file "%1$s" could not be found. |
| PKG_021 | error | Corrupted image file encountered. |
| PKG_022 | warning | Wrong file extension for image. The image is a "%1$s" file but has the file extension "%2$s". |
| PKG_023 | usage | Validating the EPUB against version 2.0, default validation profile will be used. |
| PKG_024 | info | Uncommon EPUB file extension. |
| RSC_001 | error | File "%1$s" could not be found. |
| RSC_002 | fatal | Required META-INF/container.xml resource could not be found. |
| RSC_003 | error | No rootfile tag with media type "application/oebps-package+xml" was found in the container. |
| RSC_004 | info | File "%1$s" could not be decrypted. |
| RSC_005 | error | Error while parsing file: %1$s |
| RSC_006 | error | Remote resource reference not allowed; resource must be placed in the OCF. |
| RSC_006b | usage | Resource "%1$s" is located outside the EPUB Container; please check the resource is retrieved in scripted content. |
| RSC_007 | error | Referenced resource "%1$s" could not be found in the EPUB. |
| RSC_007w | warning | Referenced resource "%1$s" could not be found in the EPUB. |
| RSC_008 | error | Referenced resource "%1$s" is not declared in the OPF manifest. |
| RSC_009 | warning | A non-SVG image resource should not be defined with a fragment identifier. |
| RSC_010 | error | Reference to non-standard resource type found. |
| RSC_011 | error | Found a reference to a resource that is not a spine item. |
| RSC_012 | error | Fragment identifier is not defined. |
| RSC_013 | error | Fragment identifier is used in a reference to a stylesheet resource. |
| RSC_014 | error | Fragment identifier defines an incompatible resource type. |
| RSC_015 | error | A fragment identifier is required for svg use tag references. |
| RSC_016 | fatal | Fatal Error while parsing file: %1$s |
| RSC_017 | warning | Warning while parsing file: %1$s |
| RSC_018 | warning | Alternative image file "%1$s" could not be found. |
| RSC_019 | warning | EPUBs with Multiple Renditions should contain a META-INF/metadata.xml file. |
| RSC_020 | error | %1$s" is not a valid URI. |
| RSC_021 | error | A Search Key Map Document must point to Content Documents ("%1$s" was not found in the spine). |
| RSC_022 | info | Cannot check image details (requires Java version 7 or higher). |
| RSC_023 | warning | Couldn’t parse host of URL "%1$s" (probably due to disallowed characters or missing slashes after the protocol) |
| SCP_001 | usage | Use of Javascript eval() function in EPUB scripts is a security risk. |
| SCP_002 | usage | Use of XMLHttpRequest in EPUB scripts is a security risk. |
| SCP_003 | usage | Local and Session Storage is not currently supported. |
| SCP_004 | error | Content file contains script which is not supported in EPUB v2. |
| SCP_006 | usage | Inline scripts found. |
| SCP_007 | usage | Script references "innerHtml". |
| SCP_008 | usage | Script references "innerText". |
| SCP_009 | usage | Content file uses mouse event handlers. |
| SCP_010 | usage | Epub 3 content file contains script. |