> For the complete documentation index, see [llms.txt](https://docs.infotopics.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.infotopics.com/showmemore/features/source-target-sankey-diagram/data-strucuture.md).
# Data strucuture
A Source target sankey diagram requires a recursive data model due to its intricate representation of data flows between different entities. The basic requirement is a source, target and a value.
Circular loops and external flows are currently unsupported in the source-target Sankey diagram. If your system involves a circular loop, please refer to the circular Sankey diagram for proper representation.
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