Extended syntax for read/write-attribute

:write-attribute enhancements for complex attributes
Map write enhancements

:write-attribute(name=map-attribute.myKey value="newValue")

List write enhancements

:write-attribute(name=list-attribute[1] value="new-element-value")
:write-attribute(name=list-attribute.element-value value="new-element-value")

Map read enhancements

1. return value of map-attribute with key "myKey"
   :read-attribute(name=map-attribute.myKey)

List read enhancements

1. return element under index 5 of list-attribute
   :read-attribute(name=list-attribute[5])

Generic complex attributes enhancments

1. return property.subproperty from complex attribute
   :read-attribute(name=complex-attribute.property.subproperty)
2. return subproperty of 5th property from complex attribute
   :read-attribute(name=complex-attribute[5].subproperty)

1. set subproperty of 5th property of complex attribute
   :write-attribute(name=complex-attribute[5].subproperty, value="new-value")

1. set property.subproperty.subsubproperty of attribute "complext-attribute to "new-value"
   :write-attribute(name=complex-attribute.property.subproperty.subsubproperty, value="new-value")

1. return value of complex attribute with key "myKey"
   :read-attribute(name=complex-attribute.myKey)
2. return "property" of complex-attribute element on index 5
   :read-attribute(name=complex-attribute[5].property)
3. return object of complex-attribute element on index 5
   :read-attribute(name=complex-attribute[5])