textthumbCaption

TextthumbCaption is a parameter used in some wiki templates to specify the caption text that accompanies a thumbnail image. It is not part of the core MediaWiki software, but a convention adopted by custom templates and extensions to separate caption handling from other image rendering options. In template-driven wikis, image rendering often includes file name, size, alignment, and caption; a dedicated textthumbCaption parameter allows authors to store and manipulate the visible caption text independently of the image source or styling commands.

Typical usage involves assigning the caption text to the textthumbCaption field within a template call. For example, a template that renders thumbnails might look like {{Thumbnail|Image.jpg|textthumbCaption=An example image|width=200px}}. Some templates also provide a separate caption parameter or use textthumbCaption in combination with other parameters to support localization, formatting, or accessibility needs.

Rationale and benefits include easier translation workflows, more consistent styling across galleries, and improved accessibility by enabling targeted handling of caption text. Separating caption text into a distinct parameter allows templates to apply specific CSS classes or markup to captions while keeping the image rendering logic intact.

Limitations and compatibility: textthumbCaption is not a standardized feature across all wikis. Its support depends on the specific template or extension in use, and without a compatible implementation, the parameter may be ignored. When editing, consult the template documentation for the correct parameter name, behavior, and any syntax nuances. Related concepts include thumbnail formatting, caption, alt text, and template-based image rendering.