anchor.diff:  every characteristics
   must be followed by a Term Source REF and Term Accession Number. Details on both are
   the next items in this table | Organism is a mandatory attribute in BioSamples,
  -so Characteristics[Organism] is mandatory
  +so *Characteristics[Organism]* is mandatory
   
   |Term Source REF | Identifies the controlled vocabulary that this term comes from. Examples are NCBITAXON, BTO
  -
  -*Please note* even if you are not providing a ontology annotation, remember not
  -to miss the tab delimiter
   | Optional
   
   |Term Accession Number | The accession number from the Source (Term Source Ref), example for
   Organism = Homo Sapiens and Term Source Ref = NCBITAXON, the Term Accession Number is
   http://purl.obolibrary.org/obo/NCBITaxon_9606
  -
  -*Please note* even if you are not providing a ontology annotation, remember not
  -to miss the tab delimiter | Optional
  +| Optional
   
   |Comment[bsd_relationship:<relationship_type>] | The sample relationship with any other
   sample in the file or in the BioSamples database
   
  -*Please note* If you are trying to establish a relationship with between samples that are
  +*Please note* If you are trying to establish a relationship between samples that are
   in the same file you are preparing to upload to BioSamples, you can refer samples by sample
  -name in the file, if you want to establish a relationship with a sample that is already in BioSamples
  +name in the file. If you wish to establish a relationship with a sample that is already in BioSamples
   you need to mention the accession of the sample
   | Optional
   
  
positive.code: Term Source Ref and Term Accession Number column headers following it. While filling up the
  data (rows) in the file you may choose to provide blank values if you don't have the information
  for it. In the below example you can always opt to not provide the Term Source Ref and
  Term Accession Number but the column headers must be kept intact as in the example below
  
      Example : Characteristics[Organism]	Term Source REF	Term Accession Number
  
  
  2. All samples might not have all the data as per the columns specified in the TSV file, please remember
  to add a tab if you are not specifying any value. Example if you are not specifying Term Source Ref
  and Term Accession Number for all characteristics you still need to provide the tabs. This will help us
  to parse the file correctly
  
      Example : Characteristics[Organism]	Term Source REF	Term Accession Number
                Homo sapiens
  
negative.code: We welcome your feedback on the uploader, feedback certainly helps us improve.
  Please write to us at mailto:biosamples@ebi.ac.uk[biosamples@ebi.ac.uk] to let us know your inputs
  and improvement suggestions
  