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preparing for variable deref
Mon, 10 Apr 2017 17:29:24 +0100, by Henry S. Thompson
plumb in and use inverted ref table (via key)
Fri, 07 Apr 2017 18:42:47 +0100, by Henry S. Thompson
towards inverted map of refs
Thu, 06 Apr 2017 18:31:46 +0100, by Henry S. Thompson
switch to elements from attributes and default namespace
Thu, 06 Apr 2017 17:24:30 +0100, by Henry S. Thompson

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