Tools and Framework Development and Deployment Guidelines . What is The Best Approach?

Hi guys!

Suppose you developed a tool, framework, library on InterSystems ObjectScript for InterSystems Data Platform, share it via Open Exchange and want people to install it. 

What is the best strategy if it is a library and supposed to be called from different namespaces?

Here are the following thoughts:

1. Tool's developer should be able to use globals to read/store data the tool needs.

2. Tool's consumer should be confident, that the thing he/she installs will not harm the application's data.

3. A tool should be callable from any application's namespace.

4. Tool's installation(in general) should not request manual security changes (e.g. grant the write access to IRISLIB) and %YourClass is not an option.

5. It's easy to uninstall the tool - just delete the namespace/database (maybe delete some web-apps too).

In this case I see the following scenario acceptable the most:

1. Every new tool should install itself into a new special namespace and database for your tool. E.g. COMMUNITYLIB. Use %Installer fro then.

2. If you need the tool to be called from other application namespaces, map classes to a %All.

Here are the good examples of this type of tool installations:

RESTForms, DeepSeeWeb, MONLBL  - install itself into new namespaces/databases.

Not perfect examples: 

WebTerminal, ClassExplorer - need write access to the %SYS namespace.

Thoughts?