> For the complete documentation index, see [llms.txt](https://b-greve.gitbook.io/beginners-guide-to-clean-data/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://b-greve.gitbook.io/beginners-guide-to-clean-data/type-and-format-related-problems.md).

# Type- and format-related problems

- [Inconsistent timestamp formats](https://b-greve.gitbook.io/beginners-guide-to-clean-data/type-and-format-related-problems/untitled.md)
- [Whitespace-padded strings](https://b-greve.gitbook.io/beginners-guide-to-clean-data/type-and-format-related-problems/whitespace-padded-strings.md)
- [Binary data](https://b-greve.gitbook.io/beginners-guide-to-clean-data/type-and-format-related-problems/binary-data.md)
- [Semi-structured log files](https://b-greve.gitbook.io/beginners-guide-to-clean-data/type-and-format-related-problems/semi-structured-log-files.md)
- [Proprietary data formats](https://b-greve.gitbook.io/beginners-guide-to-clean-data/type-and-format-related-problems/proprietary-data-formats.md)
- [Spreadsheets](https://b-greve.gitbook.io/beginners-guide-to-clean-data/type-and-format-related-problems/spreadsheets.md)