Some PDF documents have special unicode symbols which are belonged to Private Use Area PUA see description at https//en.wikipedia.org/wiki/Private_Use_Areas. This symbols cause an PDF/A compliant errors like Text is mapped to Unicode Private Use Area but no ActualText entry is present. This enumeration declares a strategies which can be used to handle PUA symbols....are belonged to Private Use Area (PUA), see description at https://en...wikipedia.org/wiki/Private_Use_Areas . This symbols cause an PDF/A...