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--- a/src/rcldb/rcldoc.cpp
+++ b/src/rcldb/rcldoc.cpp
@@ -30,6 +30,7 @@
     const string Doc::keyds("dbytes");
     const string Doc::keyfmt("fmtime");
     const string Doc::keyfn("filename");
+    const string Doc::keytcfn("containerfilename");
     const string Doc::keyfs("fbytes");
     const string Doc::keyipt("ipath");
     const string Doc::keykw("keywords");