Complex or hybrid image

Definition

https://www.w3.org/WAI/tutorials/images/complex/ In cases where a short description is not sufficient, provide two parts: a short alt description (with the location of the longer description when appropriate), and a long text representation of the essential information in the image with formatted tables of any numerical values Options: 1) provide a text link to a separate web page or a section of the same web page that contains the long description; 2) describe the location of the long description in the alt attribute; 3) enclose both the image and its long description in <figure>, with the long description wrapped in the <figcaption> element; 4) provide a link to the long description via longdesc (not fully supported, pair with option 1). For text-only descriptions, aria-describedby attribute can be used to link to a description of the image that is provided anywhere on the same web page.