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Last modified by Artur on 2025/08/19 10:43
From version 4.5
edited by Helena
on 2025/05/21 21:31
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To version 4.7
edited by Helena
on 2025/05/21 21:32
Change comment: There is no comment for this version

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... ... @@ -121,24 +121,28 @@
121 121  
122 122  A..Z (upper case alphabetic), 0..9 (numeric), _ (underscore)
123 123  
124 -1. **Observation values** are:
125 -1*. Decimal numerics (signed only if they are negative);
126 -1*. The maximum number of significant figures is:
127 -1*. 15 for a positive number
128 -1*. 14 for a positive decimal or a negative integer
129 -1*. 13 for a negative decimal
130 -1*. Scientific notation may be used.
131 -1. **Uncoded statistical concept** text values are:
132 -1*.
133 -1**. Maximum 1050 characters;
134 -1**. From ISO 8859-1 character set.
135 -1. **Time series keys**:
124 +**5. Observation values** are:
136 136  
137 -In principle, the maximum permissible length of time series keys used in a data exchange does not need to be restricted. However, for working purposes, an effort is made to limit the maximum length to 35 characters; in this length, also (for SDMXEDI) one (separator) position is included between all successive dimension values; this means that the maximum length allowed for a pure series key (concatenation of dimension values) can be less than 35 characters.  The separator character is a colon (“:”) by conventional usage.
126 +* Decimal numerics (signed only if they are negative);
127 +* The maximum number of significant figures is:
128 +* 15 for a positive number
129 +* 14 for a positive decimal or a negative integer
130 +* 13 for a negative decimal
131 +* Scientific notation may be used.
138 138  
133 +**6. Uncoded statistical concept** text values are:
134 +
135 +*
136 +** Maximum 1050 characters;
137 +** From ISO 8859-1 character set.
138 +
139 +**7. Time series keys**:
140 +
141 +In principle, the maximum permissible length of time series keys used in a data exchange does not need to be restricted. However, for working purposes, an effort is made to limit the maximum length to 35 characters; in this length, also (for SDMXEDI) one (separator) position is included between all successive dimension values; this means that the maximum length allowed for a pure series key (concatenation of dimension values) can be less than 35 characters. The separator character is a colon (“:”) by conventional usage.
142 +
139 139  == 3.4 SDMX-ML and SDMX-EDI Best Practices ==
140 140  
141 -=== 3.4.1 Reporting and Dissemination Guidelines ===
145 +=== 3.4.1 Reporting and Dissemination Guidelines ===
142 142  
143 143  **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.
144 144