DEF/ANAL - issue GWDP-668: Re-name Columns in WL Tabular Display 
https://internal.cida.usgs.gov/jira/browse/GWDP-668

Tried making XPaths explicit -- no significant performance improvement.
DEF/ANAL - issue GWDP-668: Re-name Columns in WL Tabular Display 
https://internal.cida.usgs.gov/jira/browse/GWDP-668

Tried flattening XQuery iteration target -- slower.
DEF/ANAL - issue GWDP-668: Re-name Columns in WL Tabular Display 
https://internal.cida.usgs.gov/jira/browse/GWDP-668

Working on XQuery performance. Not solved yet.