https://github.com/topics/pdf-parsing https://github.com/topics/table-extraction
https://github.com/topics/visidata
https://github.com/topics/sierra-api https://github.com/topics/innovative-interfaces
https://github.com/topics/metadata
https://github.com/topics/code4lib
https://github.com/topics/bagit https://github.com/topics/oai-pmh
https://github.com/topics/marcxml-record https://github.com/topics/marc