Hello again, I have a matching rule for cite commands that look as follows: <cite id="hunt:86" opt="authoryear"/> The rule is this (kudoos to Taco): \defineXMLargument [cite] {\expanded{\cite[\XMLpar{cite}{opt}{}][\XMLpar{cite}{id}{}]}} Sometimes I would like to have the '(Hunt et. al., 1986)' produced by above combination to look like '(see e.g. Hunt et. al., 1986)'. Taco pointed out in response to a question to list that I could do that by handing a 'left={(see e.g. }' to the cite command, however I fail to be able to do that. A XML node like this <cite id="hunt:86" opt="authoryear,left={(see e.g.}"/> results on compilation with above rule in the following error: ! Missing \endcsname inserted. <to be read again> \leftargument \XML:ent:tex-leftbrace ...ace \else \leftargument \fi <argument> ...r,left=\getXMLentity {tex-leftbrace} see e.g.\getXMLentity {tex... \expanded ...\long \xdef \@@expanded {\noexpand #1 }\@@expanded \docite ...on [\csname @@pv#2compress\endcsname ]} [ \v!yes =>\bibcitecompre... \XML:ele:cite/ ...}{opt}{}][\XMLpar {cite}{id}{}]} {} l.112 ...nt:86" opt="authoryear,left={see e.g.}"/> ) changed the field dramat... Can anybody help me out with this? Thanks, Joh