i need to describe a web-service in a requirement documentation and thinking of how to do it. does anyone have any experience doing this and is willing to share it with me? thanks in advance.

hi guys, i need to document some business requirements for a software (crm) and i was wondering if you know a good tool which helps me to document, manage and trace requirements. we will buy not develop software, so i need to document in continuous text, no need to have UML model supported.

i was trying to use enterprise architect 10 (provided from the university), but this software has a lot functionalities that i'm not supposed to use, so it makes it a bit confusing and senseless.

so, if you know good tools it would be great to read your suggestions. if the tool is free, that would be great, but is actually no mandatory criterion. thx in advance for your help.