Arguments
- indicator
 INE indicator ID as a 7 character string. Example: "0010003".
- lang
 One of "PT" or "EN". Default is "PT".
Value
A data frame with dim_num (dimension number), abrv (dimension description) and versao (dimension version) for the selected indicator. A fourth column 'nota_dsg' is present for some indicators, with additional notes about the dimensions.
Details
If the indicator is not valid, returns "(PT) O codigo do indicador nao existe. / (EN) The indicator code does not exist." 
Calling is_indicator_valid() before using this function is recommended.
