UniParc XML parser
Process the UniParc XML file (uniparc_all.xml.gz) downloaded from the UniProt website into CSV files that can be loaded into a relational database.
Example
Parsing 1 million lines takes about 5.5 seconds:
$ mkdir uniparc
$ time bash -c "zcat tests/uniparc_1mil.xml.gz | uniparc_xml_parser >/dev/null"
real 0m5.564s
user 0m5.528s
sys 0m0.132s
The actual uniparc_all.xml.gz file is about 5 billion rows.
FAQ
Why not split uniparc_all.xml.gz into multiple small files and process them in parallel
- Splitting the file requires reading the entire file. If we're reading the entire file anyway, why not parse it as we read it?
- Having a single process which parses
uniparc_all.xml.gzmakes it easier to create an incremental unique index column (e.g.UniparcXRef.idx,Property.idx, etc.).