Hello all, You'll see in a parallel message that I've just sent an expl3 release to CTAN. There are two important changes to highlight, both deprecations. *Primitives* When expl3 was first written, the only required primitives were from TeX90, and all could happily be named \tex_...:D. e-TeX primitives, when added, were named \etex_...:D to keep things 'clear'. Subsequently, pdfTeX, XeTeX, LuaTeX and (u)pTeX have all added primitives, and some have been ported between engines. To date, these have been stored under engine names, e.g. \pdftex_...:D, but that is increasingly complex. The team have decided to move *all* primitives to the \tex_...:D namespace, and to deprecate the older names. As direct primitive access should only be used where there is no expl3 interface, and should take the form of \cs_new_eq:NN \__pkg_local_name:w \tex_...:D the number of public packages impacted is small. The standard deprecation period (running to the end of 2019) applies to the older names. *Integer constants* The naming of integer constants has to-date been non-standard: \c_one, etc. At the same time, the use of constants is less important than it was when expl3 was first developed: the routine application of integer expression processing means that termination of numbers is now not an issue, whilst performance of modern PCs means that the time saving compared to explicit values is *extremely* small. We have now deprecated most of the constants, and moved those retained to the naming \c_<value>_int. Joseph