Word-Wrap not allowed in document template

We're using the document template to export a document in pdf. Because one of the attributes is a very long barcode, it is printed as one long row of characters on the pdf. So I need to wrap the barcode, but it doesn't work with css. I've tried word-wrap:break-word; on the table cell, but then I'm getting a xsl-fo error that word-wrap is not supported.
1 answers

In HTML to only way to achieve this is using CSS 3, so the only workaround I can think of is inserting some spaces.