Add command(s) to identify variable labels that do not follow a (regex) pattern

[arthur-shaw]

Problem

Data producers may want all variable labels to follow a certain format (e.g., start with the variable number, be in sentence case, etc.). Beyond visual inspection, there are no good tools for detecting deviations from the desired pattern.

Implementation ideas

A potential algorithm might be:

• Get the list of (all) variables
• Loop over each variable
• Extract its variable label via local var_label : variable label varname
• Determine whether the label matches the user-provided regex pattern
• If not, then include the variable name in a local that compiles variables whose labels fail to follow the desired pattern
• Return the list of variables whose label fails to follow the pattern