> For the complete documentation index, see [llms.txt](https://docs.n8n.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.n8n.io/build/work-with-data.md).

# Work with data

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[Overview](/build/work-with-data/overview.md)
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[Understand n8n's data structure](/build/work-with-data/understand-n8ns-data-structure.md)
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[Expressions versus data nodes](/build/work-with-data/expressions-versus-data-nodes.md)
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[Reference data](/build/work-with-data/reference-data.md)
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[Transform data](/build/work-with-data/transform-data.md)
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[Filter out unwanted data](/build/work-with-data/filter-out-unwanted-data.md)
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[Pin and mock data](/build/work-with-data/pin-and-mock-data.md)
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[Handle special data types](/build/work-with-data/handle-special-data-types.md)
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[Data tables](/build/work-with-data/data-tables.md)
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