The first rung naming a registered extractor that supports the file type. A rung that cannot read this format falls through as if unset, so a source can name a PDF extractor without it having to handle the spreadsheets beside the PDFs.
The first rung naming a registered extractor that supports the file type. A rung that cannot read this format falls through as if unset, so a source can name a PDF extractor without it having to handle the spreadsheets beside the PDFs.