OMOP/Documentation/CommonDataModel_Wiki_Files/StandardizedVocabularies/RELATIONSHIP.md

The RELATIONSHIP table provides a reference list of all types of relationships that can be used to associate any two concepts in the CONCEPT_RELATIONSHP table.

Field	Required	Type	Description
relationship_id	Yes	varchar(20)	The type of relationship captured by the relationship record.
relationship_name	Yes	varchar(255)	The text that describes the relationship type.
is_hierarchical	Yes	varchar(1)	Defines whether a relationship defines concepts into classes or hierarchies. Values are 1 for hierarchical relationship or 0 if not.
defines_ancestry	Yes	varchar(1)	Defines whether a hierarchical relationship contributes to the concept_ancestor table. These are subsets of the hierarchical relationships. Valid values are 1 or 0.
reverse_relationship_id	Yes	varchar(20)	The identifier for the relationship used to define the reverse relationship between two concepts.
relationship_concept_id	Yes	integer	A foreign key that refers to an identifier in the CONCEPT table for the unique relationship concept.

Conventions

• There is one record for each Relationship.
• Relationships are classified as hierarchical (parent-child) or non-hierarchical (lateral)
• They are used to determine which concept relationship records should be included in the computation of the CONCEPT_ANCESTOR table.
• The relationship_id field contains an alphanumerical identifier, that can also be used as the abbreviation of the Relationship.
• The relationship_name field contains the unabbreviated names of the Relationship.
• Relationships all exist symmetrically, i.e. in both direction. The relationship_id of the opposite Relationship is provided in the reverse_relationship_id field.
• Each Relationship also has an equivalent entry in the Concept table, which is recorded in the relationship_concept_id field. This is for purposes of creating a closed Information Model, where all entities in the OMOP CDM are covered by unique Concepts.
• Hierarchical Relationships are used to build a hierarchical tree out of the Concepts, which is recorded in the CONCEPT_ANCESTOR table. For example, "has_ingredient" is a Relationship between Concept of the Concept Class 'Clinical Drug' and those of 'Ingredient', and all Ingredients can be classified as the "parental" hierarchical Concepts for the drug products they are part of. All 'Is a' Relationships are hierarchical.
• Relationships, also hierarchical, can be between Concepts within the same Vocabulary or those adopted from different Vocabulary sources.
• In past versions of the RELATIONSHIP table, the relationship_id used to be a numerical value. A conversion table between these old and new IDs is given below:

Previous Relationship_id	Version 5 Relationship_id
1	LOINC replaced by
2	Has precise ing
3	Has tradename
4	RxNorm has dose form
5	Has form
6	RxNorm has ing
7	Constitutes
8	Contains
9	Reformulation of
10	Subsumes
11	NDFRT has dose form
12	Induces
13	May diagnose
14	Has physio effect
15	Has CI physio effect
16	NDFRT has ing
17	Has CI chem class
18	Has MoA
19	Has CI MoA
20	Has PK
21	May treat
22	CI to
23	May prevent
24	Has metabolites
25	Has metabolism
26	May be inhibited by
27	Has chem structure
28	NDFRT - RxNorm eq
29	Has recipient cat
30	Has proc site
31	Has priority
32	Has pathology
33	Has part of
34	Has severity
35	Has revision status
36	Has access
37	Has occurrence
38	Has method
39	Has laterality
40	Has interprets
41	Has indir morph
42	Has indir device
43	Has specimen
44	Has interpretation
45	Has intent
46	Has focus
47	Has manifestation
48	Has active ing
49	Has finding site
50	Has episodicity
51	Has dir subst
52	Has dir morph
53	Has dir device
54	Has component
55	Has causative agent
56	Has asso morph
57	Has asso finding
58	Has measurement
59	Has property
60	Has scale type
61	Has time aspect
62	Has specimen proc
63	Has specimen source
64	Has specimen morph
65	Has specimen topo
66	Has specimen subst
67	Has due to
68	Has relat context
69	Has dose form
70	Occurs after
71	Has asso proc
72	Has dir proc site
73	Has indir proc site
74	Has proc device
75	Has proc morph
76	Has finding context
77	Has proc context
78	Has temporal context
79	Findinga sso with
80	Has surgical appr
81	Using device
82	Using energy
83	Using subst
84	Using acc device
85	Has clinical course
86	Has route of admin
87	Using finding method
88	Using finding inform
92	ICD9P - SNOMED eq
93	CPT4 - SNOMED cat
94	CPT4 - SNOMED eq
125	MedDRA - SNOMED eq
126	Has FDA-appr ind
127	Has off-label ind
129	Has CI
130	ETC - RxNorm
131	ATC - RxNorm
132	SMQ - MedDRA
135	LOINC replaces
136	Precise ing of
137	Tradename of
138	RxNorm dose form of
139	Form of
140	RxNorm ing of
141	Consists of
142	Contained in
143	Reformulated in
144	Is a
145	NDFRT dose form of
146	Induced by
147	Diagnosed through
148	Physiol effect by
149	CI physiol effect by
150	NDFRT ing of
151	CI chem class of
152	MoA of
153	CI MoA of
154	PK of
155	May be treated by
156	CI by
157	May be prevented by
158	Metabolite of
159	Metabolism of
160	Inhibits effect
161	Chem structure of
162	RxNorm - NDFRT eq
163	Recipient cat of
164	Proc site of
165	Priority of
166	Pathology of
167	Part of
168	Severity of
169	Revision status of
170	Access of
171	Occurrence of
172	Method of
173	Laterality of
174	Interprets of
175	Indir morph of
176	Indir device of
177	Specimen of
178	Interpretation of
179	Intent of
180	Focus of
181	Manifestation of
182	Active ing of
183	Finding site of
184	Episodicity of
185	Dir subst of
186	Dir morph of
187	Dir device of
188	Component of
189	Causative agent of
190	Asso morph of
191	Asso finding of
192	Measurement of
193	Property of
194	Scale type of
195	Time aspect of
196	Specimen proc of
197	Specimen identity of
198	Specimen morph of
199	Specimen topo of
200	Specimen subst of
201	Due to of
202	Relat context of
203	Dose form of
204	Occurs before
205	Asso proc of
206	Dir proc site of
207	Indir proc site of
208	Proc device of
209	Proc morph of
210	Finding context of
211	Proc context of
212	Temporal context of
213	Asso with finding
214	Surgical appr of
215	Device used by
216	Energy used by
217	subst used by
218	Acc device used by
219	Clinical course of
220	Route of admin of
221	Finding method of
222	Finding inform of
226	SNOMED - ICD9P eq
227	SNOMED cat - CPT4
228	SNOMED - CPT4 eq
239	SNOMED - MedDRA eq
240	Is FDA-appr ind of
241	Is off-label ind of
243	Is CI of
244	RxNorm - ETC
245	RxNorm - ATC
246	MedDRA - SMQ
247	Ind/CI - SNOMED
248	SNOMED - ind/CI
275	Has therap class
276	Therap class of
277	Drug-drug inter for
278	Has drug-drug inter
279	Has pharma prep
280	Pharma prep in
281	Inferred class of
282	Has inferred class
283	SNOMED proc - HCPCS
284	HCPCS - SNOMED proc
285	RxNorm - NDFRT name
286	NDFRT - RxNorm name
287	ETC - RxNorm name
288	RxNorm - ETC name
289	ATC - RxNorm name
290	RxNorm - ATC name
291	HOI - SNOMED
292	SNOMED - HOI
293	DOI - RxNorm
294	RxNorm - DOI
295	HOI - MedDRA
296	MedDRA - HOI
297	NUCC - CMS Specialty
298	CMS Specialty - NUCC
299	DRG - MS-DRG eq
300	MS-DRG - DRG eq
301	DRG - MDC cat
302	MDC cat - DRG
303	Visit cat - PoS
304	PoS - Visit cat
305	VAProd - NDFRT
306	NDFRT - VAProd
307	VAProd - RxNorm eq
308	RxNorm - VAProd eq
309	RxNorm replaced by
310	RxNorm replaces
311	SNOMED replaced by
312	SNOMED replaces
313	ICD9P replaced by
314	ICD9P replaces
315	Multilex has ing
316	Multilex ing of
317	RxNorm - Multilex eq
318	Multilex - RxNorm eq
319	Multilex ing - class
320	Class - Multilex ing
321	Maps to
322	Mapped from
325	Map includes child
326	Included in map from
327	Map excludes child
328	Excluded in map from
345	UCUM replaced by
346	UCUM replaces
347	Concept replaced by
348	Concept replaces
349	Concept same_as to
350	Concept same_as from
351	Concept alt_to to
352	Concept alt_to from
353	Concept poss_eq to
354	Concept poss_eq from
355	Concept was_a to
356	Concept was_a from
357	SNOMED meas - HCPCS
358	HCPCS - SNOMED meas
359	Domain subsumes
360	Is domain