draw in

v 1: remove body fluids such as blood [syn: {aspirate}, {suck in}]

2: as of a plane's landing gear [syn: {retract}]

3: direct toward itself or oneself; "Her good looks attract the

stares of many men" [syn: {attract}, {pull}, {pull in}]

[ant: {repel}]

4: advance or converge on; "The police were closing in on him"

[syn: {close in}]

5: move into (a station) of trains [syn: {pull in}, {get in}, {move

in}] [ant: {pull out}]

6: draw something in by or as if by a vacuum; "Mud was sucking

at her feet" [syn: {suck}]

7: attract or elicit; "The school attracts students with

artistic talents"; "His playing drew a crowd" [syn: {attract},

{fetch}, {pull}, {pull in}, {draw}]

8: draw in as if by suction; "suck in tyour cheeks and stomach"

[syn: {suck in}]

Darwin

1. A general purpose structuring tool of

use in building complex {distributed systems} from diverse

components and diverse component interaction mechanisms.

Darwin is being developed by the Distributed Software

Engineering Section of the Department of Computing at

{Imperial College}. It is in essence a {declarative} binding

language which can be used to define hierarchic compositions

of interconnected components. Distribution is dealt with

orthogonally to system structuring. The language allows the

specification of both static structures and dynamic structures

which evolve during execution. The central abstractions

managed by Darwin are components and services. Bindings are

formed by manipulating references to services.

The {operational semantics} of Darwin is described in terms of

the {Pi-calculus}, {Milner}'s calculus of mobile processes.

The correspondence between the treatment of names in the

Pi-calculus and the management of service references in Darwin

leads to an elegant and concise Pi-calculus model of Darwin's

{operational semantics}. The model has proved useful in

arguing the correctness of Darwin implementations and in

designing extensions to Darwin and reasoning about their

behaviour.

{Distributed Software Engineering Section

(http://www-dse.doc.ic.ac.uk/)}. {Darwin publications

(http://scorch.doc.ic.ac.uk/dse-papers/darwin/)}.

E-mail: Jeff Magee , Naranker Dulay

.

2. {Core War}.

(1998-10-30)