VD data pipeline

Code to create tabular versions of the VD17 and VD18 bibliographic databases.

Runnning the pipeline

Install Python dependencies using your favourite method. Then, just run make -j. This will:

1. Download the VD17 and VD18 data from the respective websites.
2. Download authority data referred to from the VD17 and VD18 data (along with a few additional GND ids) from the GND.
3. Convert the downloaded data into Parquet and TSV formats using bibxml2.