-Allow '&&', ' and ' and ' AND '.
+HTML-escape expression in the output (to quote &).
-Allow '||', ' or ' and ' OR '.
-Allow 'NOT ' and 'not '.
+Use grako instead of PLY.
-Forbid stupid expressions: double NOT, extra parens and so on.
+
+Sort posts by date or tags.
+
+
+Group posts by date or tags.