Serge, > Could you please specify which version of YAML has been approved for use, and which python/C++ libraries to use for reading/writing YAML formatted data? I don’t see any relevant third party packages at sw.lsstcorp.org yet. Anaconda comes with PyYaml 3.10, which in turn wraps libyaml. I'd start with that (although I guess there might be a problem having two copies [or, worse, versions] of libyaml running around). You could use yaml-cpp if you think it's better. YAML 1.1 and 1.2 are supposed to be practically compatible. Don't use YAML 1.0. -- Kian-Tat Lim, LSST Data Management, [log in to unmask] ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the QSERV-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1