ROBOT Report - ohd

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Types of errors

LevelNumber of errors
INFO196
WARN51
ERROR5

Error breakdown

RuleNumber of errors
missing_superclass119
lowercase_definition77
annotation_whitespace24
missing_definition20
missing_obsolete_label5
missing_label2
missing_ontology_description1
missing_ontology_license1
missing_ontology_title1
duplicate_label_synonym1
equivalent_class_axiom_no_genus1

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Row Level Rule Name Subject Property Value
0 ERROR missing_label OHD:0000000 rdfs:label
1 ERROR missing_label OHD:0000234 rdfs:label
2 ERROR missing_ontology_description http://purl.obolibrary.org/obo/ohd/ohd-base.owl dc:description
3 ERROR missing_ontology_license http://purl.obolibrary.org/obo/ohd/ohd-base.owl dc:license
4 ERROR missing_ontology_title http://purl.obolibrary.org/obo/ohd/ohd-base.owl dc:title
5 WARN annotation_whitespace OHD:0000006 IAO:0000115 A tooth restoration procedure in which a dental restoration material is placed into a site that is located in the crown of the tooth.
6 WARN annotation_whitespace OHD:0000010 IAO:0000115 A clinical finding is a specified output of a dental exam and is about the oral cavity, maxillofacial area, and/or the adjacent and associated structures, or their parts, or pathological anatomical entities derived from them. The finding has a part that is about when the exam that led to the finding occured well as other data items specifying the nature of the finding. @en
7 WARN annotation_whitespace OHD:0000010 dc11:source Adapted from Mosby's definition of dentistry: The evaluation, diagnosis, and/or treatment (nonsurgical, surgical, or related procedures) of diseases, disorders, and/or conditions of the oral cavity, maxillofacial area, and/or the adjacent and associated structures and their impact on the body; provided by dental professionals, within the scope of his/her education, training, and experience, in accordance with the ethics of the profession and applicable law. (Mosby. Mosby's Dental Dictionary, 2nd Edition. Mosby, 102007. p. 173).
8 WARN annotation_whitespace OHD:0000016 IAO:0000116 Bill Duncan 09/30/2015: Professional prophylaxis, radiographs, sealants, and nonsurgical periodontal therapy are among the procedures performed by a hygienist. Most are licensed to administer local anesthesia, depending on applicable regulations in their area. They usually work for a dentist in a dental office or clinic under a form of supervision. In some locations hygienists are allowed to practice without a dentist's supervision.
9 WARN annotation_whitespace OHD:0000017 IAO:0000115 a dental health care provider role that inheres in a person who is qualified by training and licensed by a state or region to diagnose and treat abnormalities of the teeth, gums, and underlying bone, including conditions caused by disease, trauma, and heredity
10 WARN annotation_whitespace OHD:0000019 IAO:0000115 A conversational, visual and tactile examination in which the clinician evaluates the status of the patient's medical, dental and oral health. @en
11 WARN annotation_whitespace OHD:0000026 IAO:0000116 Bill Duncan 5/14/2012: We have added the necessary condtion that a missing tooth finding is about 'exactly 1 Secondary Dentition'.
12 WARN annotation_whitespace OHD:0000031 IAO:0000116 Titus Schleyer 3/4/2014: definition updated
13 WARN annotation_whitespace OHD:0000037 IAO:0000115 A material combination in which a moldable restorative material is placed directly into or on the tooth. The material then hardens and becomes (essentially) part of the tooth.
14 WARN annotation_whitespace OHD:0000038 IAO:0000115 A material combination in which a rigid piece of restoration material is attached to a tooth. The restoration is attached to the tooth by mechanical forces or some form of cement or glue.
15 WARN annotation_whitespace OHD:0000057 IAO:0000115 A surgical dental procedure that removes a tooth from the oral cavity.
16 WARN annotation_whitespace OHD:0000057 IAO:0000119 Mosby. Mosby's Dental Dictionary, 2nd Edition. Mosby, 102007. p. 238
17 WARN annotation_whitespace OHD:0000092 IAO:0000115 This annotation is used to indicate that an individual is asserted to be a member of a class. This is useful when needing to find only the non-inferred type of an individual, and not the all the inferred types. For example, suppose x is a member of the class 'material entity' and 'material entity' is a subclass of 'independent continuant'. This entails that x will be a member of 'independent continuant'. However, by using this annotation to assert that x is a member of 'material entity', you can query for x's 'asserted type' and ignore the other inferred types in the class hierarchy.
18 WARN annotation_whitespace OHD:0000100 IAO:0000115 A label naming a type of secondary tooth canonically found in humans, adopted by the American Dental Association, and commonly used as labels on odontograms (toothcharts) and clinical notes. The Universal Numbering System uses No. 1 through 32 for the 32 teeth in the permanent dentition, starting with 1 for the maxillary right third molar, going around the arch to the maxillary left third molar as 16; dropping down on the same side, the left mandibular third molar becomes 17, and then the numbers increase around the lower arch to 32, which is the lower right third molar. @en
19 WARN annotation_whitespace OHD:0000100 IAO:0000119 Book:Scheid, Rickne. Woelfel's Dental Anatomy, 8th Edition. Lippincott Williams & Wilkins, 01/2011. pp. i - ii). @en
20 WARN annotation_whitespace OHD:0000158 IAO:0000115 A procelain fused to nobal metal crown restoration procedure that uses high noble metal as a substrate.
21 WARN annotation_whitespace OHD:0000164 IAO:0000115 A crown restoration procedure in which the artifical crown used to restore the tooth is formed by cutting a window into a stainless steel prosthetic crown and filling the window with resin.
22 WARN annotation_whitespace OHD:0000165 IAO:0000115 a dental health care provider role that inheres in a person who is a an auxiliary to the dental operator
23 WARN annotation_whitespace OHD:0000202 IAO:0000115 An oral evaluation that is performed on new patients; established patients who have had a significant change in health conditions or other unusual circumstances; or established patients who have been absent from active treatment for three or more years. It is a thorough evaluation and recording of the extraoral and intraoral hard and soft tissues. It may require interpretation of information acquired through additional diagnostic procedures. This includes an evaluation for oral cancer where indicated, the evaluation and recording of the patients dental and medical history and a general health assessment. It may include the evaluation and recording of dental caries, missing or unerupted teeth, restorations, existing prostheses, occlusal relationships, periodontal conditions (including periodontal screening and/or charting), hard and soft tissue anomalies, etc.
24 WARN annotation_whitespace OHD:0000203 IAO:0000115 An oral evaluation performed on patients showing signs or symptoms of periodontal disease and for patients with risk factors for such disease, such as smoking or diabetes. It includes evaluation of periodontal conditions, probing and charting, evaluation and recording of the patients dental and medical history and general health assessment. It may include the evaluation and recording of dental caries, missing or unerupted teeth, restorations and occlusal relationships.
25 WARN annotation_whitespace OHD:0000302 IAO:0000116 usually made of porcelain or plastic
26 WARN annotation_whitespace OHD:0000310 IAO:0000115 a prosthesis that replaces one or more, but less than all, of the natural teeth and associated structures
27 WARN annotation_whitespace OHD:0000311 IAO:0000116 Dan Caplan 12/13/2014: Mosby's definition is not quite corrrect. The support could also include other teeth that are not adjacent to the endentulous area. The important point is that the prosthesis is supported by existing teeth (wherever they are in the arch), and not by the gingiva.
28 WARN annotation_whitespace OHD:0000314 IAO:0000116 Bill Duncan / Alan Ruttenber 12/16/2014: Prosthics may be either functional for non-functional. For example, a glass eye bears a prosthetic role, but it does not see.
29 WARN duplicate_label_synonym OHD:0000169 IAO:0000118 resin onlay restoration procedure
30 WARN equivalent_class_axiom_no_genus OHD:0000002 BFO:0000055 OHD:0000190
31 WARN missing_definition OHD:0000000 IAO:0000115
32 WARN missing_definition OHD:0000029 IAO:0000115
33 WARN missing_definition OHD:0000030 IAO:0000115
34 WARN missing_definition OHD:0000065 IAO:0000115
35 WARN missing_definition OHD:0000159 IAO:0000115
36 WARN missing_definition OHD:0000162 IAO:0000115
37 WARN missing_definition OHD:0000167 IAO:0000115
38 WARN missing_definition OHD:0000168 IAO:0000115
39 WARN missing_definition OHD:0000191 IAO:0000115
40 WARN missing_definition OHD:0000192 IAO:0000115
41 WARN missing_definition OHD:0000199 IAO:0000115
42 WARN missing_definition OHD:0000208 IAO:0000115
43 WARN missing_definition OHD:0000209 IAO:0000115
44 WARN missing_definition OHD:0000210 IAO:0000115
45 WARN missing_definition OHD:0000215 IAO:0000115
46 WARN missing_definition OHD:0000254 IAO:0000115
47 WARN missing_definition OHD:0000258 IAO:0000115
48 WARN missing_definition OHD:0000295 IAO:0000115
49 WARN missing_definition OHD:0000313 IAO:0000115
50 WARN missing_definition OHD:0000316 IAO:0000115
51 WARN missing_obsolete_label OHD:0000141 rdfs:label resin with predomitly base metal dental restoration
52 WARN missing_obsolete_label OHD:0000143 rdfs:label porcelain fused to noble metal dental restoration material
53 WARN missing_obsolete_label OHD:0000144 rdfs:label porcelain fused to high noble metal dental restoration material
54 WARN missing_obsolete_label OHD:0000145 rdfs:label porcelain fused to predomitly base metal dental restoration material
55 WARN missing_obsolete_label OHD:0000188 rdfs:label stainless steel with resin window dental restoration material
56 INFO lowercase_definition OHD:0000011 IAO:0000115 should use obi class with modifications to not include restriction that has specified output is a diagnosis, and/or subclass the obi class
57 INFO lowercase_definition OHD:0000014 IAO:0000115 a data property that relates an individual patient to the literal string that represents the patient's id
58 INFO lowercase_definition OHD:0000015 IAO:0000115 a data property that relates either: 1. a finding to the date on which it was recorded 2. a process to the date on which it occrred
59 INFO lowercase_definition OHD:0000016 IAO:0000115 a dental health care provider role that inheres in a person who is a licensed dental professional that specializes in preventative care
60 INFO lowercase_definition OHD:0000017 IAO:0000115 a dental health care provider role that inheres in a person who is qualified by training and licensed by a state or region to diagnose and treat abnormalities of the teeth, gums, and underlying bone, including conditions caused by disease, trauma, and heredity
61 INFO lowercase_definition OHD:0000018 IAO:0000115 a dental health care provider that bears a dentist role
62 INFO lowercase_definition OHD:0000020 IAO:0000115 a dental health care provider that bears a dental hygienist role
63 INFO lowercase_definition OHD:0000028 IAO:0000115 a missing tooth finding in which tooth 14 is found to be missing
64 INFO lowercase_definition OHD:0000032 IAO:0000115 a dental exam which focuses on soft tissue in and near the mouth.
65 INFO lowercase_definition OHD:0000050 IAO:0000115 a data property that relates an individual to the date on which the individual was born
66 INFO lowercase_definition OHD:0000051 IAO:0000115 a health care provider that bears a dental health care provider role
67 INFO lowercase_definition OHD:0000052 IAO:0000115 a health care provider role that inheres in a person who is licensed to provide dental health care
68 INFO lowercase_definition OHD:0000053 IAO:0000115 an annotation property that relates an individual to the data source that was used to extract information about the individual
69 INFO lowercase_definition OHD:0000059 IAO:0000115 a missing tooth finding in which tooth 1 is found to be missing
70 INFO lowercase_definition OHD:0000060 IAO:0000115 a missing tooth finding in which tooth 2 is found to be missing
71 INFO lowercase_definition OHD:0000061 IAO:0000115 a missing tooth finding in which tooth 3 is found to be missing
72 INFO lowercase_definition OHD:0000062 IAO:0000115 a missing tooth finding in which tooth 4 is found to be missing
73 INFO lowercase_definition OHD:0000063 IAO:0000115 a missing tooth finding in which tooth 5 is found to be missing
74 INFO lowercase_definition OHD:0000064 IAO:0000115 a missing tooth finding in which tooth 6 is found to be missing
75 INFO lowercase_definition OHD:0000066 IAO:0000115 a missing tooth finding in which tooth 7 is found to be missing
76 INFO lowercase_definition OHD:0000067 IAO:0000115 a missing tooth finding in which tooth 8 is found to be missing
77 INFO lowercase_definition OHD:0000068 IAO:0000115 a missing tooth finding in which tooth 9 is found to be missing
78 INFO lowercase_definition OHD:0000069 IAO:0000115 a missing tooth finding in which tooth 10 is found to be missing
79 INFO lowercase_definition OHD:0000070 IAO:0000115 a missing tooth finding in which tooth 11 is found to be missing
80 INFO lowercase_definition OHD:0000071 IAO:0000115 a missing tooth finding in which tooth 12 is found to be missing
81 INFO lowercase_definition OHD:0000072 IAO:0000115 a missing tooth finding in which tooth 13 is found to be missing
82 INFO lowercase_definition OHD:0000073 IAO:0000115 a missing tooth finding in which tooth 15 is found to be missing
83 INFO lowercase_definition OHD:0000074 IAO:0000115 a missing tooth finding in which tooth 16 is found to be missing
84 INFO lowercase_definition OHD:0000075 IAO:0000115 a missing tooth finding in which tooth 17 is found to be missing
85 INFO lowercase_definition OHD:0000076 IAO:0000115 a missing tooth finding in which tooth 18 is found to be missing
86 INFO lowercase_definition OHD:0000077 IAO:0000115 a missing tooth finding in which tooth 19 is found to be missing
87 INFO lowercase_definition OHD:0000078 IAO:0000115 a missing tooth finding in which tooth 20 is found to be missing
88 INFO lowercase_definition OHD:0000079 IAO:0000115 a missing tooth finding in which tooth 21 is found to be missing
89 INFO lowercase_definition OHD:0000080 IAO:0000115 a missing tooth finding in which tooth 22 is found to be missing
90 INFO lowercase_definition OHD:0000081 IAO:0000115 a missing tooth finding in which tooth 23 is found to be missing
91 INFO lowercase_definition OHD:0000082 IAO:0000115 a missing tooth finding in which tooth 24 is found to be missing
92 INFO lowercase_definition OHD:0000083 IAO:0000115 a missing tooth finding in which tooth 25 is found to be missing
93 INFO lowercase_definition OHD:0000084 IAO:0000115 a missing tooth finding in which tooth 26 is found to be missing
94 INFO lowercase_definition OHD:0000085 IAO:0000115 a missing tooth finding in which tooth 27 is found to be missing
95 INFO lowercase_definition OHD:0000086 IAO:0000115 a missing tooth finding in which tooth 28 is found to be missing
96 INFO lowercase_definition OHD:0000087 IAO:0000115 a missing tooth finding in which tooth 29 is found to be missing
97 INFO lowercase_definition OHD:0000088 IAO:0000115 a missing tooth finding in which tooth 30 is found to be missing
98 INFO lowercase_definition OHD:0000089 IAO:0000115 a missing tooth finding in which tooth 31 is found to be missing
99 INFO lowercase_definition OHD:0000090 IAO:0000115 a missing tooth finding in which tooth 32 is found to be missing
100 INFO lowercase_definition OHD:0000097 IAO:0000115 a data property in which the values provide information as to whether a patient is actively being cared for by the practicet; takes values \"active\" and \"inactive\"
101 INFO lowercase_definition OHD:0000165 IAO:0000115 a dental health care provider role that inheres in a person who is a an auxiliary to the dental operator
102 INFO lowercase_definition OHD:0000170 IAO:0000115 a dentist role that inheres in a person a dentist who practices as part of the dental team to provide educational, clinical and therapeutic patient services; and can provide basic preventive and restorative treatment to children and adults, and extractions of primary (baby) teeth under the supervision of a dentist
103 INFO lowercase_definition OHD:0000171 IAO:0000115 a dentist role that inheres in a person who specializes in performing endodontic procedures
104 INFO lowercase_definition OHD:0000172 IAO:0000115 a dentist role that inheres in a person who specializes in performing oral surgery
105 INFO lowercase_definition OHD:0000173 IAO:0000115 a dentist role that inheres in a person who has received specialized training in treating disorders that cause orofacial pain, such as TMJ disorder (TMD)
106 INFO lowercase_definition OHD:0000174 IAO:0000115 a dentist role that inheres in a person who specializes in the prevention and correction of irregular teeth, as by means of braces
107 INFO lowercase_definition OHD:0000175 IAO:0000115 a dentist role that inheres in a person who specializes in children's oral health
108 INFO lowercase_definition OHD:0000176 IAO:0000115 a dentist role that inheres in a person who specializes in the prevention, diagnosis, and treatment of periodontal disease, oral inflammation, and in the placement of dental implants
109 INFO lowercase_definition OHD:0000177 IAO:0000115 a dentist role that inheres in a person who specializes in the aesthetic (cosmetic) restoration and replacement of teeth
110 INFO lowercase_definition OHD:0000178 IAO:0000115 a health care provider role that inheres in a person who specializes in the protection, promotion, and optimization of health and abilities, prevention of illness and injury, alleviation of suffering through the diagnosis and treatment of human response, and advocacy in the care of individuals, families, communities, and populations
111 INFO lowercase_definition OHD:0000179 IAO:0000115 a Homo sapiens that bears a health care provider role
112 INFO lowercase_definition OHD:0000180 IAO:0000115 a health care provider that bears a registered nurse role
113 INFO lowercase_definition OHD:0000181 IAO:0000115 a dental health care provider that bears a dental therapist role
114 INFO lowercase_definition OHD:0000182 IAO:0000115 a dentists that bears a endodontist role
115 INFO lowercase_definition OHD:0000183 IAO:0000115 a dentist that bears an oral surgeon role
116 INFO lowercase_definition OHD:0000184 IAO:0000115 a dentist that bears an orofacial pain dentist role
117 INFO lowercase_definition OHD:0000185 IAO:0000115 a dentist that bears an orthodontist role
118 INFO lowercase_definition OHD:0000186 IAO:0000115 a dentist that bears a pediatric dentist role
119 INFO lowercase_definition OHD:0000187 IAO:0000115 a dentist that bears a periodontist role
120 INFO lowercase_definition OHD:0000204 IAO:0000115 a physical examination of the soft tissue of the mouth, including the lips, mucosa, hard and soft palate, tongue, and floor of mouth
121 INFO lowercase_definition OHD:0000205 IAO:0000115 a physical examination of the soft tissue of the head and neck with attention to the temporomandibular joint area
122 INFO lowercase_definition OHD:0000212 IAO:0000115 a role that inheres in a person who is licensed to provide health care
123 INFO lowercase_definition OHD:0000213 IAO:0000115 a dentist that bears a prosthodontist role
124 INFO lowercase_definition OHD:0000216 IAO:0000115 relates a health care encounter such as a inpatient, outpatient, or hospital stay to the next such encounter for the same patient.
125 INFO lowercase_definition OHD:0000217 IAO:0000115 relates a health care encounter such as a inpatient, outpatient, or hospital stay to any subsequent such encounter for the same patient.
126 INFO lowercase_definition OHD:0000218 IAO:0000115 a data property used to record the date of a patient's first dental visit
127 INFO lowercase_definition OHD:0000219 IAO:0000115 a data property used to record the last date on which a patient had a dental visit
128 INFO lowercase_definition OHD:0000234 IAO:0000115 a data property whose value is an ADA universal tooth number that represents a tooth which is missing from a dentition
129 INFO lowercase_definition OHD:0000301 IAO:0000115 a processed material that bears a prothetic role
130 INFO lowercase_definition OHD:0000302 IAO:0000115 a prosthesis that has been fabricated for use as a substitute for a natural tooth
131 INFO lowercase_definition OHD:0000310 IAO:0000115 a prosthesis that replaces one or more, but less than all, of the natural teeth and associated structures
132 INFO lowercase_definition OHD:0000360 IAO:0000115 a data property whose value is an ADA universal tooth number that represents the tooth associated with a tooth root that is missing from a dentition
133 INFO missing_superclass OHD:0000008 rdfs:subClassOf
134 INFO missing_superclass OHD:0000012 rdfs:subClassOf
135 INFO missing_superclass OHD:0000018 rdfs:subClassOf
136 INFO missing_superclass OHD:0000020 rdfs:subClassOf
137 INFO missing_superclass OHD:0000022 rdfs:subClassOf
138 INFO missing_superclass OHD:0000023 rdfs:subClassOf
139 INFO missing_superclass OHD:0000030 rdfs:subClassOf
140 INFO missing_superclass OHD:0000039 rdfs:subClassOf
141 INFO missing_superclass OHD:0000040 rdfs:subClassOf
142 INFO missing_superclass OHD:0000041 rdfs:subClassOf
143 INFO missing_superclass OHD:0000042 rdfs:subClassOf
144 INFO missing_superclass OHD:0000045 rdfs:subClassOf
145 INFO missing_superclass OHD:0000046 rdfs:subClassOf
146 INFO missing_superclass OHD:0000047 rdfs:subClassOf
147 INFO missing_superclass OHD:0000049 rdfs:subClassOf
148 INFO missing_superclass OHD:0000051 rdfs:subClassOf
149 INFO missing_superclass OHD:0000054 rdfs:subClassOf
150 INFO missing_superclass OHD:0000055 rdfs:subClassOf
151 INFO missing_superclass OHD:0000094 rdfs:subClassOf
152 INFO missing_superclass OHD:0000095 rdfs:subClassOf
153 INFO missing_superclass OHD:0000096 rdfs:subClassOf
154 INFO missing_superclass OHD:0000098 rdfs:subClassOf
155 INFO missing_superclass OHD:0000099 rdfs:subClassOf
156 INFO missing_superclass OHD:0000138 rdfs:subClassOf
157 INFO missing_superclass OHD:0000139 rdfs:subClassOf
158 INFO missing_superclass OHD:0000140 rdfs:subClassOf
159 INFO missing_superclass OHD:0000142 rdfs:subClassOf
160 INFO missing_superclass OHD:0000148 rdfs:subClassOf
161 INFO missing_superclass OHD:0000149 rdfs:subClassOf
162 INFO missing_superclass OHD:0000150 rdfs:subClassOf
163 INFO missing_superclass OHD:0000151 rdfs:subClassOf
164 INFO missing_superclass OHD:0000152 rdfs:subClassOf
165 INFO missing_superclass OHD:0000153 rdfs:subClassOf
166 INFO missing_superclass OHD:0000154 rdfs:subClassOf
167 INFO missing_superclass OHD:0000155 rdfs:subClassOf
168 INFO missing_superclass OHD:0000158 rdfs:subClassOf
169 INFO missing_superclass OHD:0000159 rdfs:subClassOf
170 INFO missing_superclass OHD:0000160 rdfs:subClassOf
171 INFO missing_superclass OHD:0000161 rdfs:subClassOf
172 INFO missing_superclass OHD:0000162 rdfs:subClassOf
173 INFO missing_superclass OHD:0000163 rdfs:subClassOf
174 INFO missing_superclass OHD:0000164 rdfs:subClassOf
175 INFO missing_superclass OHD:0000166 rdfs:subClassOf
176 INFO missing_superclass OHD:0000167 rdfs:subClassOf
177 INFO missing_superclass OHD:0000169 rdfs:subClassOf
178 INFO missing_superclass OHD:0000179 rdfs:subClassOf
179 INFO missing_superclass OHD:0000180 rdfs:subClassOf
180 INFO missing_superclass OHD:0000181 rdfs:subClassOf
181 INFO missing_superclass OHD:0000182 rdfs:subClassOf
182 INFO missing_superclass OHD:0000183 rdfs:subClassOf
183 INFO missing_superclass OHD:0000184 rdfs:subClassOf
184 INFO missing_superclass OHD:0000185 rdfs:subClassOf
185 INFO missing_superclass OHD:0000186 rdfs:subClassOf
186 INFO missing_superclass OHD:0000187 rdfs:subClassOf
187 INFO missing_superclass OHD:0000189 rdfs:subClassOf
188 INFO missing_superclass OHD:0000192 rdfs:subClassOf
189 INFO missing_superclass OHD:0000193 rdfs:subClassOf
190 INFO missing_superclass OHD:0000194 rdfs:subClassOf
191 INFO missing_superclass OHD:0000195 rdfs:subClassOf
192 INFO missing_superclass OHD:0000210 rdfs:subClassOf
193 INFO missing_superclass OHD:0000213 rdfs:subClassOf
194 INFO missing_superclass OHD:0000220 rdfs:subClassOf
195 INFO missing_superclass OHD:0000231 rdfs:subClassOf
196 INFO missing_superclass OHD:0000233 rdfs:subClassOf
197 INFO missing_superclass OHD:0000235 rdfs:subClassOf
198 INFO missing_superclass OHD:0000236 rdfs:subClassOf
199 INFO missing_superclass OHD:0000237 rdfs:subClassOf