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Last modified by Artur on 2025/08/19 10:43
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143 143  
144 144  === 3.4.1 Reporting and Dissemination Guidelines ===
145 145  
146 -**3.4.1.1 Central Institutions and Their Role in Statistical Data Exchanges **Central institutions are the organisations to which other partner institutions "report" statistics. These statistics are used by central institutions either to compile aggregates and/or they are put together and made available in a uniform manner (e.g. on-line or on a CD-ROM or through file transfers). Therefore, central institutions receive data from other institutions and, usually, they also "disseminate" data to individual and/or institutions for end-use.  Within a country, a NSI or a national central bank (NCB) plays, of course, a central institution role as it collects data from other entities and it disseminates statistical information to end users. In SDMX the role of central institution is very important: every statistical message is based on underlying structural definitions (statistical concepts, code lists, DSDs) which have been devised by a particular agency, usually a central institution. Such an institution plays the role of the reference "structural definitions maintenance agency" for the corresponding messages which are exchanged. Of course, two institutions could exchange data using/referring to structural information devised by a third institution.
146 +==== 3.4.1.1 Central Institutions and Their Role in Statistical Data Exchanges ====
147 147  
148 +Central institutions are the organisations to which other partner institutions "report" statistics. These statistics are used by central institutions either to compile aggregates and/or they are put together and made available in a uniform manner (e.g. on-line or on a CD-ROM or through file transfers). Therefore, central institutions receive data from other institutions and, usually, they also "disseminate" data to individual and/or institutions for end-use.  Within a country, a NSI or a national central bank (NCB) plays, of course, a central institution role as it collects data from other entities and it disseminates statistical information to end users. In SDMX the role of central institution is very important: every statistical message is based on underlying structural definitions (statistical concepts, code lists, DSDs) which have been devised by a particular agency, usually a central institution. Such an institution plays the role of the reference "structural definitions maintenance agency" for the corresponding messages which are exchanged. Of course, two institutions could exchange data using/referring to structural information devised by a third institution.
149 +
148 148  Central institutions can play a double role:
149 149  
150 150  * collecting and further disseminating statistics;
151 151  * devising structural definitions for use in data exchanges.
152 152  
153 -**3.4.1.2 Defining Data Structure Definitions (DSDs)**
155 +==== 3.4.1.2 Defining Data Structure Definitions (DSDs) ====
154 154  
155 155  The following guidelines are suggested for building a DSD. However, it is expected that these guidelines will be considered by central institutions when devising new DSDs.
156 156  
157 -=== Dimensions, Attributes and Code Lists ===
159 +(% class="wikigeneratedid" id="HDimensions2CAttributesandCodeLists" %)
160 +__Dimensions, Attributes and Code Lists__
158 158  
159 159  **//Avoid dimensions that are not appropriate for all the series in the data structure definition.//**  If some dimensions are not applicable (this is evident from the need to have a code in a code list which is marked as “not applicable”, “not relevant” or “total”) for some series then consider moving these series to a new data structure definition in which these dimensions are dropped from the key structure. This is a judgement call as it is sometimes difficult to achieve this without increasing considerably the number of DSDs.
160 160  
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184 184  
185 185  The same code list can be used for several statistical concepts, within a data structure definition or across DSDs. Note that SDMX has recognised that these classifications are often quite large and the usage of codes in any one DSD is only a small extract of the full code list. In this version of the standard it is possible to exchange and disseminate a **partial code list** which is extracted from the full code list and which supports the dimension values valid for a particular DSD.
186 186  
187 -=== Data Structure Definition Structure ===
190 +(% class="wikigeneratedid" id="HDataStructureDefinitionStructure" %)
191 +__Data Structure Definition Structure__
188 188  
189 189  The following items have to be specified by a structural definitions maintenance agency when defining a new data structure definition:
190 190  
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214 214  * code list name
215 215  * code values and descriptions
216 216  
217 -Definition of data flow definitions.  Two (or more) partners performing data exchanges in a certain context need to agree on:
221 +Definition of data flow definitions. Two (or more) partners performing data exchanges in a certain context need to agree on:
218 218  
219 219  * the list of data set identifiers they will be using;
220 220  * for each data flow: