Query/View/Transformation Operational Mapping Language - Eclipse Modeling Project: A Domain-Specific Language Toolkit - page 594

13.7.2 Strings

Literal Strings are delimited by either single or double quotation marks, accord-
ing to the specification. M2M QVT OML supports only single quote marks:

var s1 : String := 'a string';

Literal Strings that fit in multiple lines can be notated as a list of literal
Strings. In the specification, they do not require the concatenation operator + ,
although M2M QVT OML requires this. For example:

var s : String := 'This string is split ' +
'across two lines';

Escape sequences are provided and are the same as those found in the Java
language. Table 13-1 lists the supported escape sequences.

Table 13-1 QVT Escape Sequences

Escape Sequence Unicode Value Name

\ b \u0008 Backspace BS

\ t \u0009 Horizontal Tab HT

\ n \u000a LineFeed LF

\ f \u000c Form Feed FF

\ r \u000d Carriage Return CR

\ “ \u0022 Double Quote “

\ ' \u0027 Single Quote ' (Note: not currently supported)

\ \ \u005c Backslash \

13.7.3 Shorthand

Repeatedly typing lengthy operation names in a QVT script, such as oclIsKind
Of() , is tiresome. In addition, superfluous text hinders readability. To address
this issue, QVT provides a number of shorthand notations.