Bazar Repository - Concept of branches and

Hi all I am writing a repository 开发者_高级运维adapter for Bzr. This is for a search engine where adapter lets me communicate to some bzr repo, check the connection, checkout or update the projects. (No commit, push or create repos) Now i dont have much experience with Bzr and such details of other scms too and get confused with its branches concept. I use --> bzr checkout branchlocation mylocallocation -- to checkout projects and --> bzr ls URlwithbranchname --to test repo.

1. Is there any tutorial on internet with basic beginners information? about branches and structure of bzr organization. I have gone through canaonical website already.
2. Any way to run checkout or list on repo name or project name, not on branch name?
3. For checkout/list, do i need to take care of username/pass authentication on repo too?
4. Also I am still not sure about bzr over ssh, sftp, ftp servers. Would it be extra functionality to allow checkout from these servers. like authentication? or any kind of handle. I know checkout works for plain http.

Any kind of basic documentation would be very helpful for me being naive to bzr.

1. http://doc.bazaar.canonical.com/bzr.dev/en/user-guide/core_concepts.html http://doc.bazaar.canonical.com/bzr.dev/en/user-guide/bazaar_workflows.html
2. No there is no functionality to check out a repository. You can list all the branches under a repository or a normal directory with the bzr branches command from the bzr-tools plugin. I think you can view the combined log of all the branches in a repository using bzr qlog from the qbzr plugin.
3. I would think any access would require the same authentication. You can set up your local bazaar to automatically authenticate.
4. sftp, ftp and bzr+ssh are supported protocals and do not need any extra setup. (Except for bzr+ssh you need bzr installed on the server)