<html> <head> <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#FFFFFF" text="#000000"> <div class="moz-cite-prefix">On 08/01/2012 08:37 AM, Kendall Moore wrote: </div> <blockquote cite="mid:CAOfcVFVeTwVSRnPkkU50bhuRLinxTx0KveDYJD8dCT25PkMQGA@mail.gmail.com" type="cite">Hello Publican users, I'm currently stuck trying to do something I would have guessed to be a simple task. I have a set of two books, and some of the content for them I would like to be shared between the books. I created a directory for the common content (at the same level as the directories for the two books) and put the XML files which contain sections in it. Now, when I try to use an xi:include to grab these sections in each of the books, I get an error trying to run publican with the '--formats=test' option. The issue seems to be that some of the tags inside of these common files have IDs, and each book attempts to import the IDs into its own namespace but fails to do so because the IDs aren't unique. Specifically, the error(s) look like the following: ../common/<some_xml_file>:6: validity error : ID <some_id> already defined If I remove all of the IDs from these common files then there is no issue, but unfortunately that is not an option for me. I link to the pieces with IDs other places by way of xrefs and need an ID to do so (or at least that's my understanding). Any help on the subject is greatly appreciated! -- Kendall <fieldset class="mimeAttachmentHeader"></fieldset> </blockquote> Hi Kendall, yes you need an ID to be the target for an xref. You didn't state it, but are you including your common content more than once in the same book? If you give some more specifics about your use case (maybe even some sample code) I can give some suggestions - I've worked around this issue several times with different strategies. - Josh </body> </html>