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15 - Keywords

The following keyword have a meaning at in some specific SDL-RT symbols listed below:
Table 3: Keywords in symbols
keywords concerned symbols
PRIO
Task definition
Task creation
Continuous signal
TO_NAME TO_ID TO_ENV VIA
Message output
FOREVER NO_WAIT
semaphore manipulation
>, <, >=, <=, !=, == true, false, else
decision branches
USE
MESSAGE
MESSAGE_LIST
STACK
additional heading symbol

16 - Syntax

All SDL-RT names must be a combination of alphabetical characters, numerical characters, and underscores. No other symbols are allowed.

Examples:
myProcessName
my_procedure_name
block_1
_semaphoreName

17 - Naming convention

Since some SDL-RT concepts can be reached through their names (processes, semaphores) each name in the system must be unique. This will make the design more legible and ease the support of SDL-RT in a tool.
It is suggested to use the following convention for names:

18 - Lexical rules

A subset of the BNF (Backus-Naur Form) is used in these pages :
<traditional English expression> as it says...
[<stuff>] stuff is optional
{<stuff>}+ stuff is present at least one or more times
{<stuff>}* stuff is present 0 or more times

19 - Glossary

ANSI

American National Standards Institute

BNF

Backus-Naur Form

ITU

International Telecommunication Union

MSC

Message Sequence Chart

OMG

Object Management Group

RTOS

Real Time Operating System

SDL

Specification and Description Language

SDL-RT

Specification and Description Language - Real Time

UML

Unified Modeling Language

XML

eXtensible Markup Language



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