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pdf-metadata-editor
PDF Metadata Editor is a simple tool you can use to edit the metadata (Author, Keywors, etc.) of a PDF document.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I am compiling an exam bank behind my uni's back by retyping old exams using LaTeX and hosting the PDFs on Google Drive. And since I am doing this without uni's approval, I cannot put any information about the exam like the name of the professor, date, course code, time allocated, points, etc. So I thought maybe I could include this kind of information in the PDF's metadata, but apparently I couldn't find any FOSS software to do that with. My pdf reader is SumatraPDF but it doesn't have an option to do that, at least to my limited knowledge.
I found this PDF Metadata Editor, if this works for you.