The tContextLoad method as described in the recipe Using tContextLoad to load contexts in Chapter 6, Managing Context Variables.
Pros
tContextLoad is more fine-grained than the other methods described previously, which means that context values could be set up for individual jobs within a project.
As with the implicit context load, use of external files is good practice for managing contexts, because they are less likely to be overwritten during deployment.
Cons
tContextLoad suffers from the same failings as implicit context load; that is, the context variable checks are against all variables or none of them. The fine grain can also be a weakness, because this method does allow much more freedom to developers and could become unmanageable.
Conclusion
The tContextLoad method provides a more fine-grained approach to contexts, giving choice to the developer as to which files and which variables within the files are required for a particular task.
Unfortunately, it does suffer from not being able to check context variables individually, which is a liability; however, if this is not so important, it does mean only a small amount of additional coding is required per job to give you the fine grain context loading.
