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Last modified by Artur on 2025/08/19 10:43
From version 4.8
edited by Helena
on 2025/05/21 21:33
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To version 4.5
edited by Helena
on 2025/05/21 21:31
Change comment: There is no comment for this version

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... ... @@ -121,27 +121,24 @@
121 121  
122 122  A..Z (upper case alphabetic), 0..9 (numeric), _ (underscore)
123 123  
124 -**5. Observation values** are:
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**:
125 125  
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.
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.
132 132  
133 -**6. Uncoded statistical concept** text values are:
134 -
135 -* Maximum 1050 characters;
136 -* From ISO 8859-1 character set.
137 -
138 -**7. Time series keys**:
139 -
140 -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.
141 -
142 142  == 3.4 SDMX-ML and SDMX-EDI Best Practices ==
143 143  
144 -=== 3.4.1 Reporting and Dissemination Guidelines ===
141 +=== 3.4.1 Reporting and Dissemination Guidelines ===
145 145  
146 146  **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.
147 147