This data contains all expenditure data by the Department of Public Expenditure and Reform for the period from inception to June 2012.
In total it contains €21,228,431.30 of expenditure, on the basis of 238 vendors who invoiced the Department for 1,565 separate invoices. It does not appear to include Purchase Orders, which the Department publishes proactively here (albeit in PDF format and only for orders over €20,000). Much of the spending involves the normal day to day spending by any government Department but gives an insight to citizens as to how public money is spent. It does not include expenses claimed or salary data.
Download the data here. (File -> Download)
This spreadsheet contains individual invoices with the largest first:
This is a breakdown per vendor name with the largest first: