(CC'd to [EMAIL PROTECTED], but not anymore to [EMAIL PROTECTED], where the thread started.)
>>>>> On Mon, 22 Apr 2002 13:28:01 +0200, [EMAIL PROTECTED] (Robert Joop) said: > On 02-04-22 13:06:59 CEST, Andreas J. Koenig wrote: >> >>>>> On Mon, 22 Apr 2002 11:49:18 +0200, [EMAIL PROTECTED] (Robert Joop) said: >> >> > hi, >> > i've got a problem understanding namespaces. >> > i've written a module that provides X500::DN objects, it parses them >> > from RFC2253 strings and formats them into that format, among other >> > things. >> > it installs like this: >> >> > Installing /tmp/X500/DN.pod >> > Installing /tmp/X500/DN.pm >> > Installing /tmp/X500/RDN.pm >> > Installing /tmp/X500/RDN.pod >> > Installing /tmp/local/man/man3/X500::DN.3pm >> > Installing /tmp/local/man/man3/X500::RDN.3pm >> >> > there is an older module that is just a parser object, X500::DN::Parser >> > from RSAVAGE. >> > it installs like this: >> >> > Installing /tmp/X500/DN/Parser.pm >> > Installing /tmp/local/man/man3/X500::DN::Parser.3pm >> > Writing /tmp/i386-linux/auto/X500/DN/Parser/.packlist >> > Appending installation info to /tmp/i386-linux/perllocal.pod >> >> > as you can see, they don't collide on a technical level. >> >> > but do they collide on a namespace level? >> >> No. > fine, which namespace shall i pick? >> > what are the correct namespaces for the two modules? > i didn't see any answer to this question, i'm afraid. Oops, sorry, see below... >> the whole process more transparent. Let us know which questions remain >> open. > what is the relation between modules and namespaces? In many cases it's a one to one relationship, but sometimes it's a many to many relationship: one module can use several namespaces and one namespace may appear in several modules. CPAN is optimized for the case of a one to one relationship. The other cases sometimes require people talking with each other. > the RSAVAGE module that gives you X500::DN::Parser objects is under > the X500::DN namespace in the long modules list. > is this correct? Yes, I missed this in my first answer. > shouldn't this be X500::DN::Parser? Apparently, yes! Sorry, needs fixing. > if the X500::DN namespace is correct for X500::DN::Parser, do i need to > register the X500 namespace for my module that gives you X500::DN objects? No, we want a sane mapping of namespace X500::DN::Parser to X500/DN/Parser.pm as it is enforced by perl itself. > but for Net::Daemon::SSL or Math::Calc::Units or Tie::Hash::Regex > (random picks from 00modlist.long.html) the package name and the namespace > are the same! What a relief:-) > so, there some inconsistency which confuses me. I have manually corrected the database, so that Ron's entry will change from X500:: ::DN MdpO? X500 Distinguished Name parser RSAVAGE to X500::DN:: ::Parser MdpO? X500 Distinguished Name parser RSAVAGE This has the side effect that X500::DN is again an unused namespace. If you should pick it or not should be clarified between you and Ron directly. If you two can agree, it's likely everybody else will agree. > the more i look at it the more i think that X500::DN::Parser is not > registered with the right namespace...? Yes, but fixed. -- andreas
