> For the complete documentation index, see [llms.txt](https://help.aristotlemetadata.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.aristotlemetadata.com/subject-matter-and-theory.md).

# Subject Matter and Theory

- [What is metadata?](https://help.aristotlemetadata.com/subject-matter-and-theory/what-is-metadata.md)
- [Data Dictionary](https://help.aristotlemetadata.com/subject-matter-and-theory/data-dictionary.md)
- [ISO/IEC 11179  data element representation](https://help.aristotlemetadata.com/subject-matter-and-theory/iso-iec-11179-data-element-representation.md)
- [Bulk Import](https://help.aristotlemetadata.com/subject-matter-and-theory/bulk-import.md)
- [Data Lineage](https://help.aristotlemetadata.com/subject-matter-and-theory/data-lineage.md)
- [Recording a data set's data lineage](https://help.aristotlemetadata.com/subject-matter-and-theory/data-lineage/recording-a-data-sets-data-lineage.md)
- [Recording a distribution's data lineage](https://help.aristotlemetadata.com/subject-matter-and-theory/data-lineage/recording-a-distributions-data-lineage.md)
- [Viewing data lineage graphically](https://help.aristotlemetadata.com/subject-matter-and-theory/data-lineage/viewing-data-lineage-graphically.md)
- [MAST(Metadata Analysis Standards Teamwork) Methodology and IDEAL Framework](https://help.aristotlemetadata.com/subject-matter-and-theory/mast-metadata-analysis-standards-teamwork-methodology-and-ideal-framework.md)
- [Aristotle metadata user guides](https://help.aristotlemetadata.com/subject-matter-and-theory/mast-metadata-analysis-standards-teamwork-methodology-and-ideal-framework/aristotle-metadata-user-guides.md)