1. A method of providing a document service according to a service level agreement, the method involving a device comprising a hardware processor, and the method comprising: executing, by the processor, instructions that cause the device to; for each different and distinct respective service feature of at least two service features of the document service, provide at least two candidate components wherein each candidate component comprises a different set of service feature capabilities than other candidate components; and fulfill a request to provide the document service according to the service level agreement by selecting a particular service component for each respective service feature of the at least two service features of the document service, wherein the selecting the particular service component comprising: identifying a capability for the service feature that is specified by the service level agreement for the document service, and among the candidate components for the service feature, identifying a service component that provides the service feature with the capability that is specified by the service level agreement for the service feature; and composing the selected particular service components for the respective at least two service features to provide the document service.
1. A method of providing a document service according to a service level agreement, the method involving a device comprising a hardware processor, and the method comprising: executing, by the processor, instructions that cause the device to; for each different and distinct respective service feature of at least two service features of the document service, provide at least two candidate components wherein each candidate component comprises a different set of service feature capabilities than other candidate components; and fulfill a request to provide the document service according to the service level agreement by selecting a particular service component for each respective service feature of the at least two service features of the document service, wherein the selecting the particular service component comprising: identifying a capability for the service feature that is specified by the service level agreement for the document service, and among the candidate components for the service feature, identifying a service component that provides the service feature with the capability that is specified by the service level agreement for the service feature; and composing the selected particular service components for the respective at least two service features to provide the document service. 13. The method of claim 1 , wherein the identifying the particular service component providing a first service feature comprising: after identifying a second particular service component for a second service feature, identify the particular service components among candidate components for the first service feature in view of the second particular service component for the second service feature.