A picture is often worth more than a long speech. Certainly, but first of all, it can be difficult to truly understand a graph (curve, diagram, histogram, pie chart, etc.) if you do not have the data that allowed it to be created. On the other hand, some users will not be able to access the graphic rendering, and access to the data will allow them to understand the content.
Objectives
Enable or improve the understanding of the graph.
Facilitate data sharing.
Improve the accessibility of content to people with disabilities.
Improve the way content is taken into account by search engines and indexing tools.
Implementation
For each graph representing numerical data (curve, diagram, histogram, pie chart, etc.):
Display in a structured way, in the immediate context of the graph, all the numerical data it represents, for example in the form of a data table.
Or provide in the immediate context of the graphic a link to content of the same type.
Control
Check the presence, for each graph, of structured content indicating all the numerical data it represents, or of a link to a page providing them.