Dataset on Technical Barriers to Trade (TBT) specific trade concerns:

A dataset on specific trade concerns (STCs) raised by WTO members in the Technical Barriers to Trade (TBT) Committee is available from the WTO website. The dataset contains information on 318 STCs raised from 1995 to 2011 at the Harmonized System (HS), Revision 2, four-digit level. Each STC corresponds to a concern about a TBT measure maintained by one or more WTO members on one or more products.

For more information about the data see  World Trade Report 2012 section C.

Dataset on the content of Preferential Trade Agreements (PTAs):

An updated dataset on the content of preferential trade agreements (PTAs)  is now available from the WTO website.  The dataset was originally constructed for the World Trade Report 2011. The updated version consists of a comprehensive breakdown of 100 PTAs signed between 1958 and 2011.

For more information about the coding of the data see Orefice and Rocha (2011) and World Trade Report 2011, section D.2.