Fusion-JSON

Overview

Fusion-JSON is a format used for Structural Metadata, Data, and Reference Metadata. The Fusion-JSON format was created before the SDMX-JSON format became a standard as so has a slightly different syntax. In addition the Fusion-JSON format is used for Structural Metadata that is supported by the Fusion Registry which is not a part of the official SDMX Specification. This includes:

• Data Reporting Template
• Data Structure Definitions that do not conform to the standard¹
• Valuelist
• Validation Scheme

Fusion-JSON Data

Fusion-JSON for data consists of three top-level nodes:

• "header" - header information
• "dataSets" - observation data consisting of a sequence of series keys together with observation values for each time period
• "structure" - metadata for each of the dimensions and attributes in the dataset

Fusion-JSON is therefore self-describing in that it contains both the observation data and structural metadata needed to interpretet making it better suited for driving visualisations and user interfaces than SDMX-ML where the metadata needs to be retrieved separately.

The series keys do not follow the SDMX convention, rather following the form:

0:3:0:0:6
4:0:2:6:3:7:0
3:1:8:8:4:4

The numbers being indexes to the information in the "structure" section. Thus the first digit in the key 0:3:0:0:6 references the first dimension, and the first value in the list of values given for that dimension in the "structure" section. Indexing is zero based.