[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] implementation architectural view  implementation classes      generalizations      realizations  implementation diagrams  2nd      nodes  implementationClass keyword  inactive simple states, state diagrams  include dependencies      base use case      inclusion use cases  inclusion use case  increments, iterations  industrialization period of development  information hiding  initial action state      activity diagrams  initial states, state diagrams  2nd  initiator role  instance scoped objects  instance-form interactions  instance-level collaboration  instance-scoped attributes  instances     collaboration instances      component instances      contextual instances, OCL expressions      interaction instances      node instances      use-case instances  interaction diagrams  2nd  interaction instances  interaction modeling  interactions      behavior sequences      conditional      generic-form interactions      instance-form interactions      messages      optional      repeated  interfaces      APIs      binary associations      generalizations      link ends      n-ary associations      user interface components      web user interface component instances  invariants  iteration      architecture and      increments      requirements and      risk      sequence      use case  iterative approach