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-rw-r--r--pig/filter-cdx-ps.pig6
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diff --git a/pig/filter-cdx-ps.pig b/pig/filter-cdx-ps.pig
index 6e80acc..b27a547 100644
--- a/pig/filter-cdx-ps.pig
+++ b/pig/filter-cdx-ps.pig
@@ -1,3 +1,9 @@
+-- Tries to filter down a large CDX file (GWB index) to a subset of postscript
+-- files, by mimetype.
+--
+-- Author: Bryan Newbold <bnewbold@archive.org>
+-- Date: May 2018
+
%default INPUT ''
%default OUTPUT ''