{"id":244553,"date":"2024-10-19T16:04:07","date_gmt":"2024-10-19T16:04:07","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-61360-12017\/"},"modified":"2024-10-25T11:03:24","modified_gmt":"2024-10-25T11:03:24","slug":"bs-en-61360-12017","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-61360-12017\/","title":{"rendered":"BS EN 61360-1:2017"},"content":{"rendered":"
IEC 61360-1:2017 specifies principles for the definition of the properties and associated attributes and explains the methods for representing verbally defined concepts with appropriate data constructs available from IEC 61360-2. It also specifies principles for establishing a hierarchy of classification from a collection of classes, each of which represents a technical concept in the electrotechnical domain or a domain related to electrotechnology. This fourth edition cancels and replaces the third edition published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: – support of advanced constructs such as \u00b7 conditions and constraints, \u00b7 blocks, \u00b7 cardinality, \u00b7 polymorphism, \u00b7 generic and restricted enumerations, and \u00b7 mapping; – extended list of data types; – harmonization with IEC 62656-1; – support of IEC TS 62720 and of coded units; – harmonization of semantic and administrative data among the various information objects; – use of UML for data modelling; – enhanced definitions and descriptions; – introduction of examples of higher level constructs such as block, cardinality, or polymorphism as guidance for the user of the IEC 61360 series. IEC 61360-4, IEC reference collection of standard data element types and component classes, can be accessed from IEC CDD (Common Data Dictionary) \/2. The database contains the IEC reference collection of classes and associated characteristic properties (data element types or DETs) of electric\/electronic components including materials, geometry and features used in electrotechnical equipment and systems. The dictionary and database follow the methodology of Part 1 of IEC 61360 and the information model of Part 2. It has the status of a horizontal standard in accordance with \/2.<\/p>\n
PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
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2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
7<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
15<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
17<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
18<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
19<\/td>\n | 3 Terms, definitions and abbreviated terms 3.1 Terms and definitions <\/td>\n<\/tr>\n | ||||||
24<\/td>\n | Tables Table 1 \u2013 Examples of generic concepts for individual quantities <\/td>\n<\/tr>\n | ||||||
25<\/td>\n | 3.2 Abbreviated terms 4 Foundation for the concepts of IEC 61360 standard dictionaries <\/td>\n<\/tr>\n | ||||||
26<\/td>\n | Figures Figure 1 \u2013 Simplified model of IEC 61360-1 (UML class diagram) <\/td>\n<\/tr>\n | ||||||
27<\/td>\n | 5 Dictionary identification 5.1 General 5.2 Dictionary_supplier 5.3 Code <\/td>\n<\/tr>\n | ||||||
28<\/td>\n | 5.4 Version_number 5.5 Date_of_current_version 5.6 Revision_number <\/td>\n<\/tr>\n | ||||||
29<\/td>\n | 6 Property 6.1 Overview <\/td>\n<\/tr>\n | ||||||
30<\/td>\n | Table 2 \u2013 List of attributes of Property information objects as defined in IEC 61360-1 and their equivalent in IEC 61360-2 <\/td>\n<\/tr>\n | ||||||
32<\/td>\n | 6.2 Specification of information object Figure 2 \u2013 Overview model for Characteristic (UML class diagram) <\/td>\n<\/tr>\n | ||||||
33<\/td>\n | 6.3 Data_element_type_class Figure 3 \u2013 Property (UML class diagram) <\/td>\n<\/tr>\n | ||||||
34<\/td>\n | 6.4 Depends_on 6.5 Formula <\/td>\n<\/tr>\n | ||||||
35<\/td>\n | 6.6 Preferred_letter_symbol 6.7 Synonymous_letter_symbol 6.8 Attributes internal to Property <\/td>\n<\/tr>\n | ||||||
36<\/td>\n | 6.9 Code_of_alternative_unit 6.10 Code_of_list_of_units <\/td>\n<\/tr>\n | ||||||
37<\/td>\n | 6.11 Code_of_unit 6.12 Definition_class 6.13 Drawing_reference 7 Identifying_attributes 7.1 Overview <\/td>\n<\/tr>\n | ||||||
38<\/td>\n | 7.2 Specification of information object Table 3 \u2013 Globally unique identification <\/td>\n<\/tr>\n | ||||||
39<\/td>\n | 7.3 Code Figure 4 \u2013 Identifying attributes (UML class diagram) <\/td>\n<\/tr>\n | ||||||
40<\/td>\n | 7.4 Preferred_name 7.5 Revision_number <\/td>\n<\/tr>\n | ||||||
41<\/td>\n | 7.6 Short_name 7.7 Synonymous_name 7.8 Version_number <\/td>\n<\/tr>\n | ||||||
42<\/td>\n | 8 Semantic_attributes 8.1 Overview 8.2 Specification of information object 8.3 Definition Figure 5 \u2013 Semantic attributes (UML class diagram) <\/td>\n<\/tr>\n | ||||||
44<\/td>\n | 8.4 Note 8.5 Remark 8.6 Source_document_of_definition <\/td>\n<\/tr>\n | ||||||
45<\/td>\n | 9 Administrative_attributes 9.1 Overview 9.2 Specification of information object 9.3 Obsolete_date 9.4 Proposal_date Figure 6 \u2013 Administrative_attributes (UML class diagram) <\/td>\n<\/tr>\n | ||||||
46<\/td>\n | 9.5 Published_in 9.6 Published_by 9.7 Responsible_committee <\/td>\n<\/tr>\n | ||||||
47<\/td>\n | 9.8 Revision_released_on 9.9 Status_level <\/td>\n<\/tr>\n | ||||||
48<\/td>\n | 9.10 Version_initiated_on 9.11 Version_released_on 10 Value_attributes 10.1 Overview <\/td>\n<\/tr>\n | ||||||
49<\/td>\n | 10.2 Specification of information object 10.3 Alternative_units_of_measure Figure 7 \u2013 Value_attributes (UML class diagram) <\/td>\n<\/tr>\n | ||||||
50<\/td>\n | 10.4 Data_type 10.4.1 General <\/td>\n<\/tr>\n | ||||||
51<\/td>\n | 10.4.2 Simple type Figure 8 \u2013 Examples for technical data associated with connecting lines <\/td>\n<\/tr>\n | ||||||
56<\/td>\n | 10.4.3 Enumeration type <\/td>\n<\/tr>\n | ||||||
57<\/td>\n | 10.4.4 Class instance type <\/td>\n<\/tr>\n | ||||||
58<\/td>\n | 10.4.5 Class reference type 10.4.6 Aggregate type <\/td>\n<\/tr>\n | ||||||
60<\/td>\n | 10.4.7 Level type <\/td>\n<\/tr>\n | ||||||
61<\/td>\n | 10.4.8 Large object type 10.4.9 Placement type <\/td>\n<\/tr>\n | ||||||
62<\/td>\n | 10.4.10 Data type dependencies <\/td>\n<\/tr>\n | ||||||
64<\/td>\n | 10.5 Number_of_significant_digits Table 4 \u2013 Data type dependencies <\/td>\n<\/tr>\n | ||||||
65<\/td>\n | 10.6 Referenced_class_identifier 10.7 Unit_of_measure <\/td>\n<\/tr>\n | ||||||
66<\/td>\n | 10.8 Value_format <\/td>\n<\/tr>\n | ||||||
68<\/td>\n | 11 Condition_property 11.1 Specification of information object <\/td>\n<\/tr>\n | ||||||
69<\/td>\n | 11.2 Property_data_element_type 12 Dependent_condition_property 12.1 Specification of information object Figure 9 \u2013 Condition_property (UML class diagram) <\/td>\n<\/tr>\n | ||||||
70<\/td>\n | 12.2 Depends on 12.3 Property_data_element_type Figure 10 \u2013 Dependent_condition_property (UML class diagram) <\/td>\n<\/tr>\n | ||||||
71<\/td>\n | 13 Dependent_property 13.1 Specification of information object 13.2 Depends on Figure 11 \u2013 Dependent_property (UML class diagram) <\/td>\n<\/tr>\n | ||||||
72<\/td>\n | 13.3 Property_data_element_type 14 Non_dependent_property 14.1 Specification of information object 14.2 Property_data_element_type Figure 12 \u2013 Non_dependent_property (UML class diagram) <\/td>\n<\/tr>\n | ||||||
73<\/td>\n | 15 Translation_information 15.1 Specification of information object 15.2 Date_of_current_translation_revision 15.3 Language_code Figure 13 \u2013 Translation_information (UML class diagram) <\/td>\n<\/tr>\n | ||||||
74<\/td>\n | 15.4 Responsible_translator 15.5 Responsible_translator_coded 15.6 Translation_revision <\/td>\n<\/tr>\n | ||||||
75<\/td>\n | 16 Value_list 16.1 Specification of information object <\/td>\n<\/tr>\n | ||||||
76<\/td>\n | 16.2 Attributes internal to Value_list 16.3 Definition_class Figure 14 \u2013 Value_list (UML class diagram) <\/td>\n<\/tr>\n | ||||||
77<\/td>\n | 16.4 Enumerated_list_of_terms 17 Term 17.1 Specification of information object Figure 15 \u2013 Term (UML class diagram) <\/td>\n<\/tr>\n | ||||||
78<\/td>\n | 17.2 Preferred_letter_symbol_in_text 17.3 Attributes internal to Term 17.4 Definition_class 18 Drawing 18.1 Information model <\/td>\n<\/tr>\n | ||||||
79<\/td>\n | 18.2 Specification of information object Figure 16 \u2013 Overview model for Drawing concept (UML class diagram) Table 5 \u2013 List of attributes of Drawing <\/td>\n<\/tr>\n | ||||||
80<\/td>\n | 18.3 Code 18.4 Descriptive_designator Figure 17 \u2013 Drawing (UML class diagram) <\/td>\n<\/tr>\n | ||||||
81<\/td>\n | 18.5 Drawing_title 18.6 File_format <\/td>\n<\/tr>\n | ||||||
82<\/td>\n | 18.7 File_name 18.8 Revision_number <\/td>\n<\/tr>\n | ||||||
83<\/td>\n | 18.9 Version_number 18.10 Attributes internal to Drawing 19 Unit of measure 19.1 Overview <\/td>\n<\/tr>\n | ||||||
84<\/td>\n | 19.2 Specification of information object Figure 18 \u2013 Overview model for Measure concept (UML class diagram) <\/td>\n<\/tr>\n | ||||||
85<\/td>\n | 19.3 Primary_unit 19.4 Unit_in_text 19.5 Unit_XML Figure 19 \u2013 Unit_of_measure (UML class diagram) <\/td>\n<\/tr>\n | ||||||
86<\/td>\n | 19.6 Attributes internal to Unit_of_measure 19.7 Drawing_reference 20 Creation of language variants 20.1 Overview 20.2 Language-dependent attributes of a Property <\/td>\n<\/tr>\n | ||||||
87<\/td>\n | 20.3 Language-dependent attributes of an Item_class 20.4 Language-dependent attributes of a Drawing 20.5 Language-dependent attributes of a Unit_of_measure 20.6 Language-dependent attributes of a Relation 21 Item_class 21.1 Classification tree <\/td>\n<\/tr>\n | ||||||
88<\/td>\n | Figure 20 \u2013 Classification tree <\/td>\n<\/tr>\n | ||||||
90<\/td>\n | 21.2 Composition tree Table 6 \u2013 List of attributes of Item_class as defined in IEC 61360-1 and their equivalent in IEC 61360-2 <\/td>\n<\/tr>\n | ||||||
91<\/td>\n | 21.3 Use of auxiliary schemes for classification and coding of values Figure 21 \u2013 Composition tree <\/td>\n<\/tr>\n | ||||||
92<\/td>\n | 21.4 Information model 21.5 Specification of information object Figure 22 \u2013 Overview model for Concept_data (UML class diagram) <\/td>\n<\/tr>\n | ||||||
93<\/td>\n | 21.6 Class_type Figure 23 \u2013 Item_class (UML class diagram) <\/td>\n<\/tr>\n | ||||||
94<\/td>\n | 21.7 Coded_name 21.8 Attributes internal to Item_class 21.9 Applicable_data_element_type <\/td>\n<\/tr>\n | ||||||
95<\/td>\n | 21.10 Applicable_relation 21.11 Classifying_data_element_type <\/td>\n<\/tr>\n | ||||||
96<\/td>\n | 21.12 Drawing_reference 21.13 Is_case_of 21.14 Superclass <\/td>\n<\/tr>\n | ||||||
97<\/td>\n | 22 Relation 22.1 Overview Figure 24 \u2013 Overview model for Relation concept (UML class diagram) <\/td>\n<\/tr>\n | ||||||
98<\/td>\n | 22.2 Specification of information object 22.3 External_solver_for_the_formula Figure 25 \u2013 Relation (UML class diagram) <\/td>\n<\/tr>\n | ||||||
99<\/td>\n | 22.4 Formula <\/td>\n<\/tr>\n | ||||||
100<\/td>\n | 22.5 Language_for_formula_interpretation 22.6 Relation type 22.7 Role_of_the_relation <\/td>\n<\/tr>\n | ||||||
102<\/td>\n | 22.8 Attributes internal to Relation <\/td>\n<\/tr>\n | ||||||
103<\/td>\n | 22.9 Definition_class 22.10 Codomain_of_function 22.11 Domain_of_function <\/td>\n<\/tr>\n | ||||||
104<\/td>\n | 22.12 Domain_of_relation 22.13 Drawing_reference 22.14 Super_relation 23 Dictionary_element <\/td>\n<\/tr>\n | ||||||
105<\/td>\n | 24 Advanced concepts 24.1 Overview 24.2 Condition Figure 26 \u2013 Dictionary_element (UML class diagram) <\/td>\n<\/tr>\n | ||||||
106<\/td>\n | Figure 27 \u2013 Working point of a fuse <\/td>\n<\/tr>\n | ||||||
107<\/td>\n | Figure 28 \u2013 Implementation in IEC 62656-1 spreadsheet format of the example in Figure 27 <\/td>\n<\/tr>\n | ||||||
108<\/td>\n | Figure 29 \u2013 (a) Dynamic gain and noise figure measurement setup, and (b) measurement with a saturation wavelength of 1\u200a550 nm <\/td>\n<\/tr>\n | ||||||
109<\/td>\n | 24.3 Reuse of properties Figure 30 \u2013 Implementation in IEC 62656-1 spreadsheet format of the example in Figure 29 <\/td>\n<\/tr>\n | ||||||
110<\/td>\n | Figure 31 \u2013 Reuse of properties (IEC 62656-1 spreadsheet format) <\/td>\n<\/tr>\n | ||||||
111<\/td>\n | 24.4 Classes and properties for common use <\/td>\n<\/tr>\n | ||||||
112<\/td>\n | 24.5 Block Figure 32 \u2013 Use of class information objects to associate toleranced capacitance information to a fixed capacitor (IEC 62656-1 spreadsheet format) <\/td>\n<\/tr>\n | ||||||
113<\/td>\n | Figure 33 \u2013 Interpretation of Class and Property information objects forming a block <\/td>\n<\/tr>\n | ||||||
114<\/td>\n | 24.6 Cardinality Figure 34 \u2013 Example of a block (IEC 62656-1 spreadsheet format) <\/td>\n<\/tr>\n | ||||||
115<\/td>\n | Figure 35 \u2013 Interpretation of Class and Property information objects forming cardinality <\/td>\n<\/tr>\n | ||||||
116<\/td>\n | 24.7 Polymorphism 24.7.1 Overview Figure 36 \u2013 Example for a block whose number of occurrences is limited through PAA506 (IEC 62656-1 spreadsheet format) <\/td>\n<\/tr>\n | ||||||
117<\/td>\n | 24.7.2 Polymorphic choices directly assigned to the specified Item_class Figure 37 \u2013 Interpretation of Class and Property information objects forming a polymorphism <\/td>\n<\/tr>\n | ||||||
118<\/td>\n | Figure 38 \u2013 Polymorphic choices directly assigned to the specified Item_class (IEC 62656-1 spreadsheet format) <\/td>\n<\/tr>\n | ||||||
119<\/td>\n | 24.7.3 Polymorphic choices assigned to the specified Item_class through a Value_list <\/td>\n<\/tr>\n | ||||||
120<\/td>\n | Figure 39 \u2013 Polymorphic choices assigned to the specified class through a value list (IEC 62656-1 spreadsheet format) <\/td>\n<\/tr>\n | ||||||
121<\/td>\n | 24.8 Relation 24.8.1 Overview 24.8.2 Restricted enumeration <\/td>\n<\/tr>\n | ||||||
122<\/td>\n | Figure 40 \u2013 Example \u2013 Restricted enumeration (IEC 62656-1 spreadsheet format) <\/td>\n<\/tr>\n | ||||||
123<\/td>\n | 24.8.3 Grouping Figure 41 \u2013 Example \u2013 List of units for measuring the gap width of a labyrinth seal <\/td>\n<\/tr>\n | ||||||
124<\/td>\n | 25 Qualifiers Figure 42 \u2013 Example \u2013 Information objects of Figure 41 (IEC 62656-1 spreadsheet format) <\/td>\n<\/tr>\n | ||||||
125<\/td>\n | 26 Characters and character sets 26.1 Overview 26.2 Recommended character sets 26.3 Line feed 26.4 Subscript <\/td>\n<\/tr>\n | ||||||
126<\/td>\n | 26.5 Superscript 26.6 Greek characters <\/td>\n<\/tr>\n | ||||||
127<\/td>\n | Table 7 \u2013 Transliteration of Greek characters to Latin characters <\/td>\n<\/tr>\n | ||||||
128<\/td>\n | Annex A (informative) Data model <\/td>\n<\/tr>\n | ||||||
129<\/td>\n | Figure A.1 \u2013 Characteristic (UML class diagram) <\/td>\n<\/tr>\n | ||||||
130<\/td>\n | Figure A.2 \u2013 Drawing concept (UML class diagram) Figure A.3 \u2013 Category (UML class diagram) <\/td>\n<\/tr>\n | ||||||
131<\/td>\n | Figure A.4 \u2013 Measure concept (UML class diagram) Figure A.5 \u2013 Relation concept (UML class diagram) <\/td>\n<\/tr>\n | ||||||
132<\/td>\n | Figure A.6 \u2013 Value list concept (UML class diagram) <\/td>\n<\/tr>\n | ||||||
133<\/td>\n | Annex B (normative) Type classification codes of properties B.1 Property classification B.1.1 Overview B.1.2 Principles B.1.3 Quantitative Property information objects <\/td>\n<\/tr>\n | ||||||
134<\/td>\n | Table B.1 \u2013 Survey of main classes of Property information objects <\/td>\n<\/tr>\n | ||||||
135<\/td>\n | B.1.4 Non-quantitative Property information objects B.2 Survey of type classification codes for non-quantitative properties Table B.2 \u2013 Classification codes of non-quantitative data element types <\/td>\n<\/tr>\n | ||||||
136<\/td>\n | B.3 Survey of type classification codes for quantitative properties Table B.3 \u2013 Classification codes for quantities of physical chemistry and molecular physics (1 of 2) <\/td>\n<\/tr>\n | ||||||
138<\/td>\n | Table B.4 \u2013 Classification codes for quantities of electricity and magnetism <\/td>\n<\/tr>\n | ||||||
139<\/td>\n | Table B.5 \u2013 Classification codes for quantities of periodic and related phenomena Table B.6 \u2013 Classification codes for quantities of acoustics <\/td>\n<\/tr>\n | ||||||
140<\/td>\n | Table B.7 \u2013 Classification codes for quantities of heat Table B.8 \u2013 Classification codes for quantities of information <\/td>\n<\/tr>\n | ||||||
141<\/td>\n | Table B.9 \u2013 Classification codes for quantities of mechanics <\/td>\n<\/tr>\n | ||||||
142<\/td>\n | Table B.10 \u2013 Classification codes for quantities of light and related electromagnetic radiations Table B.11 \u2013 Classification codes for amounts <\/td>\n<\/tr>\n | ||||||
143<\/td>\n | Table B.12 \u2013 Classification codes for prices and tariffs Table B.13 \u2013 Classification codes for dimensionless business quantities and counts Table B.14 \u2013 Classification codes for business ratios and percentages <\/td>\n<\/tr>\n | ||||||
144<\/td>\n | Table B.15 \u2013 Classification codes for quantities of space and time <\/td>\n<\/tr>\n | ||||||
145<\/td>\n | Table B.16 \u2013 Classification codes for quantities of nuclear reactions and ionizing radiations <\/td>\n<\/tr>\n | ||||||
146<\/td>\n | Annex C (informative) Preparation of new classes and properties C.1 Responsibilities C.2 Recommended elements of data set <\/td>\n<\/tr>\n | ||||||
147<\/td>\n | Annex D (informative) Rules for defining new versions and revisions of dictionary elements D.1 Changes in the attributes of Property information objects <\/td>\n<\/tr>\n | ||||||
148<\/td>\n | Table D.1 \u2013 Overview of configuration management in Property updating operations <\/td>\n<\/tr>\n | ||||||
149<\/td>\n | D.2 Changes in the attributes of class information objects Table D.2 \u2013 Overview of configuration management in class updating operations <\/td>\n<\/tr>\n | ||||||
150<\/td>\n | Annex E (informative) Classifying_data_element_type attribute <\/td>\n<\/tr>\n | ||||||
151<\/td>\n | Annex F (informative) Conventions for names and definitions F.1 Conventions for writing definitions F.1.1 General F.1.2 ISO\/IEC 11179-4 F.1.3 ISO 704 <\/td>\n<\/tr>\n | ||||||
152<\/td>\n | F.1.4 Additional conventions F.2 Conventions for writing names F.2.1 Requirements F.2.2 Recommendations F.2.3 Mechanical quantitative property names F.2.4 Electrical quantitative property names <\/td>\n<\/tr>\n | ||||||
153<\/td>\n | F.2.5 Non-quantitative property names Table F.1 \u2013 Example of the name structure for electrical quantitative properties <\/td>\n<\/tr>\n | ||||||
154<\/td>\n | Annex G (normative) Value format specification G.1 General G.2 Notation <\/td>\n<\/tr>\n | ||||||
155<\/td>\n | Table G.1 \u2013 ISO\/IEC 14977 EBNF syntactic meta-language <\/td>\n<\/tr>\n | ||||||
156<\/td>\n | G.3 Data value format types G.4 Meta-identifier used to define the formats G.5 Quantitative value formats G.5.1 General G.5.2 NR1-value format <\/td>\n<\/tr>\n | ||||||
157<\/td>\n | G.5.3 NR2-value format G.5.4 NR3-value format <\/td>\n<\/tr>\n | ||||||
158<\/td>\n | G.5.5 NR4-value format <\/td>\n<\/tr>\n | ||||||
159<\/td>\n | G.6 Non-quantitative value formats G.6.1 General G.6.2 Alphabetic value format <\/td>\n<\/tr>\n | ||||||
160<\/td>\n | G.6.3 Mixed characters value format G.6.4 Number value format Table G.2 \u2013 Transposing European style digits into Arabic digits <\/td>\n<\/tr>\n | ||||||
161<\/td>\n | G.6.5 Mixed alphabetic or numeric characters value format G.6.6 Binary value format G.7 HTML5 format <\/td>\n<\/tr>\n | ||||||
162<\/td>\n | G.8 Value examples Table G.3 \u2013 Number value examples <\/td>\n<\/tr>\n | ||||||
163<\/td>\n | Annex H (informative) Modelling notation H.1 General H.2 UML Class H.3 Generalization H.4 Simple association Figure H.1 \u2013 Example for generalization <\/td>\n<\/tr>\n | ||||||
164<\/td>\n | H.5 Modularization with UML package Figure H.2 \u2013 Example of an association Figure H.3 \u2013 Example of an association to a UML class owned by another UML package <\/td>\n<\/tr>\n | ||||||
165<\/td>\n | Figure H.4 \u2013 Division of the IEC 61360-1 model into modules <\/td>\n<\/tr>\n | ||||||
166<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Standard data element types with associated classification scheme – Definitions. Principles and methods<\/b><\/p>\n |