X_RELATION is a fixed lexicon with the following values:
Saved
Value
Displayed Value
00 Unknown
01 Spouse
02 Common-Law Spouse
03 Partner
04 Significant Other
05 Daughter
06 Son
07 Step-Daughter
08 Step-Son
09 Granddaughter
10 Grandson
11 Father
12 Mother
14 Mother-in-Law
15 Father-in-Law
16 Grandmother
17 Grandfather
18 Son-in-Law
19 Daughter-in-Law
20 Sister
21 Brother
22 Sister-in-Law
23 Brother-in-Law
24 Aunt
25 Uncle
26 Cousin
27 Niece
28 Nephew
29 Ex-spouse
30 Neighbor
31 Friend
32 Business Contact
33 Childminder
34 Spiritual Advisor
35 Contributor
36 Step-Brother
37 Step-Father
38 Step-Mother
39 Step-Sister
40 Guardian
41 Disabled Member
42 College Student
43 Trust
44 Domestic Partner's Son
45 Domestic Partner's Daughter
46 Domestic Partner