[cad-linux-dev] Re: Decentralisation and version attributes
- From: Bruno Postle <bruno@xxxxxxxxxx>
- To: CAD linux development <cad-linux-dev@xxxxxxxxxxxxx>
- Date: Tue, 24 Aug 2004 19:16:21 +0100
On Tue 24-Aug-2004 at 13:03 -0500, Eric Wilhelm wrote:
> We'll need import and export, and the connectors are going to be written in
> multiple languages, so I'd like to keep things as simple as possible.
>
> Do you have some sample directories of Draft databases? Send links.
The Draft tarball has some test drawings:
http://bugbear.blackfish.org.uk/~bruno/draft/Draft-0.03.tar.gz
They are simplistic and need YAML-isation (I have no intention of
continuing with this home-rolled internal file-format), but they do
demonstrate some of the things I have been talking about:
- Addressing drawings/directories. Draft implements xrefs and
blocks; including live updating, recursive references and
polymorphic inheritance.
Blocks are implemented as sub-directories with relative paths,
xrefs are implemented as external directories with either
relative or absolute paths.
- Addressing elements. Individual elements are addressed using
file paths as part of the polymorphism system.
The one lesson I learnt from doing it this way is that elements need
versions ;-)
--
Bruno
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