DM-CSS is a subset of CSS, and only supports some kinds of selectors and attributes.
The following table lists all supported attributes, and whether they are supported in text output, maptext, and in other controls (labels/etc.) Other controls will often allow only one style for an entire unit of text. A checkbox in “Other” only indicates that some support exists in other controls, but it may vary by the type of control.
| Attribute | Output | Maptext | Other | Notes |
|---|---|---|---|---|
| color | ✔️ | ✔️ | ✔️ | Alpha colors may not be supported in some controls. |
| background | ✔️ | ✔️ | ✔️ | In most cases, only applies to the entire text body. |
| background-color | ✔️ | ✔️ | ||
| background-image | ✔️ | |||
| font | ✔️ | ✔️ | ✔️ | |
| font-family | ✔️ | ✔️ | ✔️ | |
| font-style | ✔️ | ✔️ | ✔️ | |
| font-weight | ✔️ | ✔️ | ✔️ | |
| font-size | ✔️ | ✔️ | ✔️ | |
| text-decoration | ✔️ | ✔️ | ✔️ | Limited to underline, overline, line-through, blink, and none. Support for each of these may vary depending on where they are used. |
| text-align | ✔️ | ✔️ | ✔️ | justify is supported in output and maptext. |
| vertical-align | ✔️ | ✔️ | Limited to top, middle, and bottom. | |
| text-indent | ✔️ | ✔️ | ||
| margin-left | ✔️ | ✔️ | ✔️ | |
| margin-right | ✔️ | ✔️ | ✔️ | |
| margin-top | ✔️ | |||
| margin-bottom | ✔️ | |||
| margin | ✔️ | ✔️ | ✔️ | |
| width | ✔️ | ✔️ | Applies only to some elements such as images. | |
| height | ✔️ | ✔️ | Applies only to some elements such as images. | |
| line-height | ✔️ | ✔️ | Support in output control is limited; line heights less than 1 are not respected. Only unitless numbers, percentages, or em units are allowed. | |
| white-space | ✔️ | ✔️ | normal, nowrap, pre, pre-wrap, pre-line | |
| text-shadow | ✔️ | |||
| -dm-text-outline | ✔️ | Custom attribute: Adds an outline to text. Values are in the form: *width color style*. The style is either blank, or any combination of the sharp and square keywords (see Outline filter). |
These pseudo-classes are allowed in some contexts, but they can only change the text color.
| Psuedo-class | Output | Maptext | Other | Notes |
|---|---|---|---|---|
| :link | ✔️ | ✔️ | ✔️ | |
| :visited | ✔️ | |||
| :active | Currently not used, but future support is planned. | |||
| :hover | ✔️ |