❯ wget https://www.courts.ca.gov/documents/fw001.pdf

❯ pdfcpu form list fw001.pdf
Pg L Field     │ Id                  │ Name
━━━━━━━━━━━━━━━┿━━━━━━━━━━━━━━━━━━━━━┿━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
1    Textfield │ 176.177.302.354     │ FW-001[0].Page1[0].RightCaption[0].CourtInfo[0]
     Textfield │ 176.177.302.355     │ FW-001[0].Page1[0].RightCaption[0].CaseNumber[0]


❯ qpdf --json fw001.pdf | jq '.acroform.fields | map({fullname, mappingname, alternativename}) | first'
{
  "fullname": "FW-001[0].Page1[0].RightCaption[0].CourtInfo[0]",
  "mappingname": "Superior Court of California County of",
  "alternativename": "Superior Court of California County of"
}