Fedora directory users - Nov 2005 - numerical prefix of schema file

Hi,

I see each schema file is prefixed with a numerical
value, such as:

00core.ldif
50ns-wcal.ldif
51ns-calendar.ldif
60pam-plugin.ldif
99user.ldif

so what does the numerical prefix mean? I just know
that
if I change the schema from the console, it ends up in
99user.ldif. But what about the others? Is it for
loading
orders, or something else?

If I add my own schema files, which value do I use for
the
prefix?

thanks

sz



	
		
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speedy zinc wrote:
> so what does the numerical prefix mean?
It is for loading order.

> I just know that if I change the schema from the console, it ends up in
> 99user.ldif.
You should avoid adding schema from the console or over-the-wire, 
because it will be handled in this way, and there are some problems with 
using 99user.ldif, e.g. if you need to install version-controlled schema 
to your servers then this technique will definitely not work.

> If I add my own schema files, which value do I use for
> the prefix?
You can use whatever you want, even numbers that are already used. The 
schema loader looks at the number first, then the alphabetical order, 
e.g. 50abc.ldif would be loaded before 50myschema.ldif.

The whole purpose behind the loading order is for dependencies, so if 
you write an objectclass in myschema.ldif and you specify it as a 
subclass to an objectclass which exists in "25somecoolschema.ldif",
then
you will want to number "myschema.ldif" with a prefix higher than 25
or
if you use 25 then you need to start the filename with something 
alphabetically later than "somecoolschema".


All of this is documented in the Deployment Guide:

http://www.redhat.com/docs/manuals/dir-server/deploy/7.1/schema.html#17755


BR,
Mike