Re: Packages - trivial question

*To*: mathgroup at smc.vnet.net*Subject*: [mg125197] Re: Packages - trivial question*From*: A Retey <awnl at gmx-topmail.de>*Date*: Tue, 28 Feb 2012 00:45:32 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <jifq3f$sl6$1@smc.vnet.net>

Hi, > I'm sorry for such a trivial question, but what does mean the > backapostroph behind the package name, when one wants to get > package? it is the character which serves as the separator for context names. > For example: << PhysicalConstants` that is just a short form for Get["PhysicalConstants`"] > I'm trying to find it in the documentation, but I'm not successfull. > Is it the same symbol as it is used for NumberMarks i.e. > 0.3333333333333333` for example? it's not a symbol and serves a completely different purpose in those to cases... > I think, that in the case of packages it means something like > "definition space", because for example: Remove["Global`*"] should > remove all the symbol definitions in current session. it removes all symbol definitions in the "Global`" context. If you have experience with other languages you can think of a context as a namespace for symbols. If you don't, think of it as a "folder" for symbol names as you have "folders" for filenames in your computers file system. > But I'm still confused of the little but magic ` nothing magic, if you are interested in the details look up tutorial/ContextsAndPackages in the documentation center and the reference pages for BeginPackage, Begin, $Context, $ContextPath. hth, albert