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+From: David Bremner <david@tethera.net>\r
+To: Daniel Kahn Gillmor <dkg@fifthhorseman.net>,\r
+ Notmuch Mail <notmuch@notmuchmail.org>\r
+Subject: Re: [PATCH] add has: query prefix to search for specific properties\r
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+Date: Sun, 17 Jul 2016 07:38:10 -0300\r
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+David Bremner <david@tethera.net> writes:\r
+\r
+> Do we want to have the same prefix listed in BOOLEAN_PREFIX_INTERNAL and\r
+> BOOLEAN_PREFIX_EXTERNAL? this seems quite fragile. If we don't though,\r
+> we have to use the same prefix name for queries as in the code (which is\r
+> already sprinkled with _find_prefix ("property") ).\r
+\r
+Thinking about it a bit more, there's really no problem here. The\r
+invariant to maintain is the names are unique across all 3 tables used\r
+by _find_prefix, not the necessarily the prefixes. Indeed there's\r
+already the example of "is" and "tag".\r
+\r
+d\r