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` elements only if there is no source file specified in the `src` attribute. Otherwise, it checks the contents of the source file. : : : : : : Enabled by default with severity  Error . File glossary.xml not found : Suggests creating `glossary.xml` when `tooltip` used, but `glossary.xml` not listed. : : : : Enabled by default with severity  Weak warning . Format element checker : Checks the `` element style and color validity. A valid `` element must specify `color`, `style`, or both attributes, and they must contain valid values. : : : : : : `style` can be a valid combination of the following: `bold`, `italic`, `strikethrough`, `underline`, `superscript`, `subscript`. : : : : : : `color` can be a hexadecimal RGB code or a valid color name, such as `#ff0000` or `Red`. : : : : : : Enabled by default with severity  Warning . GIF can be replaced with video : Checks if there is an MP4 video to replace an animation with. : : : : : : Enabled by default with severity  Warning . Include uses 'filter' instead of 'use-filter' : Detects includes with the `filter` attribute instead of `use-filter`. : : : : Usually, `filter` is used on elements inside snippets, and when you include the snippet, you specify `use-filter`. : : : : : : Enabled by default with severity  Warning . Incorrect build group path : Detects an invalid path for build group. : : : : Enabled by default with severity  Error . Incorrect label ID : Detects incorrect references to `` and `` identifiers. : : : : You can either select one of the existing labels, create a new one with the specified ID, or remove the label element. : : : : Enabled by default with severity  Error . Invalid filter value : Reports problematic filter declarations that may result in unexpected behavior: : : * Explicit `empty` values in `filter` attributes : : * Redundant or misplaced negation `!` operators : : : : : : Enabled by default with severity  Warning . Invalid line range value : Detects invalid line range values in `emphasize-lines` and `include-lines` attributes of code blocks. : : : : : : The inspection reports problems such as: : : : : * Invalid format (for example, `1-2-3`) : : * Non-positive line numbers (e.g., `0-5`) : : * Inverted ranges (e.g., `5-1`) : : * Overlapping ranges (e.g., `1-3, 2-5`) : : * Ranges that reference lines outside the displayed snippet : : : : Enabled by default with severity  Error . Large image without a thumbnail : Detects large images without a thumbnail and suggests making them expandable. : : : : : : Thumbnails are small previews that you can use in place of large images. When the user clicks on the thumbnail, it expands to the full image. : : : : You can either set `thumbnail="true"` to make the original image expandable (optionally, also set the `width` to make the image thumbnail smaller), or use `preview-src` to specify a custom preview image as a thumbnail. : : : : You can set the maximum image width allowed by the inspection in Settings | Editor | Inspections. : : : : : : Disabled by default with severity  Warning . Link to topic not in current instance : Detects links pointing to an existing topic that is not in the current help instance tree. : : : : It ignores such links if the current topic itself is not in the current help instance tree. : : : : You have several options to deal with this issue: : : : : * Mark the link with `nullable="true"`, which will render it as plain text if the target is not available : : * Exclude the containing element (such as the paragraph with the problematic link) from the current help instance : : * Include the target topic into the current help instance : : : : : : Enabled by default with severity  Error . Missing 'openapi-path' attribute : Detects missing `openapi-path` attribute either in the `` element directly or in the parent `` element. : : Enabled by default with severity  Error . Missing alt attribute inspection : Detects `` elements without the `alt` attribute. : : : : : : Always use the `alt` attribute to provide a textual alternative to non-text content (in our case, to screenshots and icons) on web pages. : : : : : : The purpose of using the `alt` attribute is to: : : : : : : * Make the page accessible to people who use screen readers. : : * Display information about non-textual page elements when they cannot be displayed. : : * Provide search engines with semantic information about the page contents. : : : : : : Enabled by default with severity  Warning . Missing entity reference : Detects attribute values that reference non-existent entities. : : : : : : For example, there must be a topic file named `introduction.topic` with an existing anchor `my_anchor` to reference it like this: : : : : : : : ``` :