Aside from ordinary screen elements, which can be referred to using their system names (s1_i1, s2_p3, …) you can create your own custom variables.
Such custom variable names must start with one of the following:
C_
CUS_
CUST_
CUSTOM_
For example:
C_IPADDRESS1
C_SERVERNAME
C_VAR1
CUST_VAR2
Creating such a variable is simple, just transfer a value to such a variable name or return a service response parameter value to such variable name, and it creates automaticaly. Each custom variable is peristently stored on a mobile device and its value can be overwritten anytime by returning a new value to the variable name.
Reading custom variable values is done as usual, using this convention:
${C_VARIABLENAME}