The following parameter notations are supported:
${<parameter>}
All characters are allowed for parameter names, except $, {, }, and #.
#<parameter>#
For manual tests, the following characters are allowed for parameter names: 0-9, a-z, A-Z, and _.
$<parameter>
For Silk Test Classic tests, the following characters are allowed for parameter names: 0-9, a-z, A-Z, and _.