To: J3 12-180r1 From: Dan Nagle Subject: Reply to 12-180 Date: 2012 October 18 Paper 12-180 from Casimir Katz requests that sequence types be made extensible, and that Fortran derived types support a union and map construct. According to N1925, the Strategic plans for WG5, and N1927, the Resolutions of the Markham 2012 meeting, the only new features to be considered for the next revision of the Fortran standard are very minor features. This is in part to allow vendors time to implement all of Fortran 2003 and Fortran 2008. It is also to allow the committees time to integrate two technical specifications, numerous interpretation requests, and wording improvements already committed for the next revision. The experience of vendors present at J3 meeting 199 indicates that implementing union and map features is difficult. Doing so in the presence of inheritance is estimated to be more difficult. Also, the committee's limited resources are stretched rather thin with existing work. Therefore, we cannot pursue this proposed work item at this time. At this stage in the development cycle, it is difficult to estimate when such a request could be undertaken. We thank Casimir Katz for his interest in Fortran.