Operational Differences - InterSystems Documentation

Other Compatibility Issues13.1.12 MultiValue Attribute Defaults For Dictionary ItemsFor UniVerse-style dictionaries (also used by UniData and Prime Information Systems), “D” typeitems (attribute 1) use attribute 6 as a MultiValue indicator. The possible values are S(ingle value) orM(ultiValue). If attribute 6 is unspecified, it defaults to S.For PICK-style dictionaries where attribute 1 is an “A” or “S” , attribute 5 is the MultiValue indicatorwith the same allowed defaults: S or M. In this case, however, if attribute 5 is not specified, it defaultsto M.Note:Traditionally, PICK dictionaries did not have a MultiValue indicator attribute. Caché Multi-Value added one.13.1.13 MultiValue File PointersFor those porting MultiValue applications to Caché, please note the following:• Only one F-Pointer in any Caché system is allowed per MultiValue file. The target of the referencecan be either a Caché an operating system file.• All other references to files named in F-Pointers must be entered as Q-Pointers.Caché uses the F-Pointers to maintain indices. If there is more than one F-Pointer to the same MultiValuefile, indices may not be updated correctly.13.1.14 MultiValue Function Defaults For QueriesIf attributes of the form, Fnnn (where “nnn” are digits) occur in an I-type and are not found first inthe dictionary or the VOC, they are now handled by default.Note:UniVerse does not process defaults like this; the VOC file contains entries for F1..F10.13.1.15 Default Terminal TypeBy default, the terminal type is assumed to be CACHE, but may be changed with the TERM command.68 Operational Differences between MultiValue and Caché