From the September 2010 issue of IDUG Journal  (International DB2 Users Group), an article by Nagesh Subrahmanyam. 

The abstract is:

ODF (Open Document Format) is a file format for office documents. At a high level, the ODF specification requires five mandatory XML documents and other optional items. This article will describe how DB2 pureXML could be used to handle ODF spreadsheet documents. Other ODF documents such as word documents, presentations, formulas, etc. could also be handled by DB2 because the ODF specification refers mainly to an archive of XML documents. However, for the sake of this article, we are considering only spreadsheets because it is easier to co-relate the rows and columns of the spreadsheet document and that of a DB2 table. This article can even be further extended into an on-line document editing software with .ods as file format and DB2 pureXML as the database.

The full text of the article is here [PDF].