Based on these two higher groupings, the overview of the structure of the SLA is as follows: 

Figure 10: General parameter and QoS parameter groupings 

4.5.1.2 Assigning Parameters to Service Functions in the SLA 

The variations in the interactions with HTTP for different service functions, or what could be 

considered HTTP resources, require a considerable amount of flexibility in how parameters 

are assigned. This was highlighted in the previous chapter where it was demonstrated that 

some derived parameters are more applicable to certain service functions and a different 

number of  parameters may want to be applied to a particular service function. Assuming 

that the following URL is requested in a Web delivered service to take the input of a HTML 

form using a POST method 

http:// webmail.cs.tcd.ie/sendMail 

First we assign this URL and the method associated with it to a service function name, in 

this case, we'll call it Send Mail