I represent a pair of associated objects--a key and a value. My instances can serve as entries in a dictionary.

	filter streaming
	byteEncode:

	objects from disk
	objectForDataStream:

	printing
	printOn: propertyListOn: storeOn:

	testing
	isSpecialWriteBinding isVariableBinding

	accessing	top
	key:value: Store the arguments as the variables of the receiver.
	value Answer the value of the receiver.
	value: Store the argument, anObject, as the value of the receiver.

	filter streaming	top
	byteEncode:

	objects from disk	top
	objectForDataStream: I am about to be written on an object file. If I am a known global, write a proxy that will hook up with the same resource in the destination system.

	printing	top
	printOn: Append to the argument, aStream, a sequence of characters that identifies the receiver.
	propertyListOn:
	storeOn: Store in the format (key->value)

	testing	top
	isSpecialWriteBinding Return true if this variable binding is write protected, e.g., should not be accessed primitively but rather by sending #value: messages
	isVariableBinding Return true if I represent a literal variable binding

	instance creation	top
	key:value: Answer an instance of me with the arguments as the key and value of the association.