[NTG-context] \centerline vs. \midaligned vs. \startalignment[middle]

Hello, there are several similar commands to produce text (or another object) to be centered on the line. What are differences (or intended usage) among \centerline, \midaligned, \startalignment[middle]? (NB: \centerline has no its-own page on wiki, but it is used at several places in wiki samples. \centerline was also mentioned here in the mailing list, when I was trying to center "tabulate" - and neither \midaligned nor \startalignment[middle] combined with \dontleavehmode worked.) TIA. Best regards, Lukas -- Ing. Lukáš Procházka [mailto:LPr@pontex.cz] Pontex s. r. o. [mailto:pontex@pontex.cz] [http://www.pontex.cz] Bezová 1658 147 14 Praha 4 Tel: +420 244 062 238 Fax: +420 244 461 038