Some Solr functions don't work with field names starting with numbers, for example: fl parameter that selects particular fields does not work with fields starts with numbers. It is needed to assign a prefix to the fields generated out of MARC/PICA/UNIMARC field names.
Some Solr functions don't work with field names starting with numbers, for example:
flparameter that selects particular fields does not work with fields starts with numbers. It is needed to assign a prefix to the fields generated out of MARC/PICA/UNIMARC field names.