Grass Valley K2 Edge Protocol Manual v1.0 - Manual (Page 50)

K2 Edge Protocol Manual – document version 1.0 – Page 50
8. Complex String Format
8.1. Introduction
A complex string is a text string defining zero or more field-value pairs in a simple format.
Example:
{ file=a000123.avf; block-count=42; }
A complex string always starts with an open curly-brace character and ends with a close curly brace
character. In between the braces zero or more field-value pairs are defined, each of them terminated with
a semi-colon.
The term complex refers to the complex data type. A complex string can hold several values as apposed
to a simple data type, that can only hold one.
8.2. Field-value pair components
A field-value pair consists of:
1. the field-identifier;
2. an equals sign;
3. the optional field-value;
4. a semi-colon;
5. optional whitespace.
This is how the complex string format looks in pseudo grammar:
complex-string :
{ whitespace
opt
field-value-seq whitespace
opt
}
field-value-seq :
field-value-pair
opt
field-value-seq field-value-pair
field-value-pair :
field-identifier =field-value
opt
; whitespace
opt
field-identifier :
[a-z][a-z0-9-]*
field-value :
[a-zA-Z0-9 -\;]*
#qot(...)toq#
#u08(...)80u#
complex-string
A complex string contains zero or more field-value pairs between curly braces. Every field-value pair is
terminated by a semicolon.
Whitespaces between field-value pairs are allowed and are ignored. Whitespaces in a field-value item are
allowed and included as part of value.