24. Func='namespace'. Using the internal RXS format: namespace

Example 24.1:

)text out='q1'

name(Peter Jensen)

age(32)

position(bike mechanics)

nationality(danish)

;

name(Hugo Jensen)

position(account manager) age(44)

nationality(danish)

;

name(Niels Olsen)

age(19) position(CEO) nationality(greek)

)endtext

)action in='q1'

)& func='namespace'

if nationality = 'danish' then do

left(name,25)" "left(position,20)" age:"age

end

)endaction

Output is:

Peter Jensen bike mechanics age:32

Hugo Jensen account manager age:44

The core principle of the namespace file-format is assigning a value to a variable this way:

variable(value)

A namespace in RXS is a file containing groups of such assignments, the groups separated by ';'. Refer to the text block in top of example 24.1 above.

Using func='namespace', each group in the file triggers the action block. Example 24.1 contains three groups; accordingly, the action block is triggered three times.

Notice:

• Writing more than one assignment per line is ok
• One assignment may span several lines. The assignment starts with ( and ends with ). In between any number of lines may exist. In assigning the value to the variable, the lines are concatenated separated by one blank character. The interleaving blank can be avoided using the concatenation operator || at the end of the line.
• Assignments are not to be put in quotes. If assignments are quoted, the quotes will be part of the assigned value.
• Quotes, single and double, may be used anywhere inside assignments.
• Parenthesis may be used inside assignments, but they must be balanced: Same number of ) and (.
• Variables assigned a value in a previous group of assignments, not given a value in the current group of assignments, are empty (that is: strings of length zero).

A pre screening of the namespace file may be conducted using the variable spacerow.

spacerow

Contains the current namespace group in namespace format

Example 24.2:

Using spacerow:

)text out='q1'

name(Peter Jensen)

age(32)

position(bike mechanics)

nationality(danish)

;

name(Hugo Jensen)

position(account manager) age(44)

nationality(danish)

;

name(Niels Olsen)

age(19) position(CEO) nationality(greek)

)endtext

)action in='q1'

)& func='namespace'

)& out='qspace'

if nationality = 'danish' then do

spacerow

end

)endaction

)action in='qspace'

)& func='namespace'

left(name,25)" "left(position,20)" age:"age

)endaction

At first, data is put into the queue 'q1', after which selected groups are copied to the queue 'qspace' from which they are formatted to output in the last action block.

Output will be as in example 24.1