|   A    |    B     |     C     |    D    |    E    |
===+========+==========+===========+=========+=========+
 1 |        |           Configurator mapping           |
---+--------+----------+-----------+---------+---------+
 2 | active | internal | pr_family | pr1     | pr2     |
---+--------+----------+-----------+---------+---------+
 3 |        | item 1   | f1        | 1,2,3   |  a,b    |
---+--------+----------+-----------+---------+---------+
 4 |        | item 2   | f1,f2     | 1       |   a     |
---+--------+----------+-----------+---------+---------+
 5 |        | item 3   | f1        |   2     |   b     |
---+--------+----------+-----------+---------+---------+