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Last modified by lzehl on 2021/07/05 18:57
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... ... @@ -111,30 +111,34 @@ 111 111 === The openMINDS schema template syntax === 112 112 113 113 (% style="text-align: justify;" %) 114 -All openMINDS metadata models us ea light-weighted schema template syntaxfor defining theexpectedmetadata. The correspondinglyformattedschemafiles use the extension: **##.schema.tpl.json##**.114 +All openMINDS metadata models are defined using a light-weighted schema template syntax. Although this schema template syntax is inspired by JSON-Schema, it outsources most schema technicalities to be handled in the openMINDS integration pipeline, making the openMINDS schemas more human-readable, especially for untrained eyes. The few remaining customized technical properties which need additional interpretation are prefixed in the syntax with **##"_"##**. Within the openMINDS integration pipeline (cf. below), the schema template syntax is interpreted, extended and flexibly translated to various formal metadata formats (e.g., JSON-Schema). The specifications of the openMINDS schema template syntax are described in following. 115 115 116 116 (% style="text-align: justify;" %) 117 -Al though, as the fileextension suggests, this openMINDS schematemplatesyntaxis inspiredbyJSON-Schema,itfacilitatesoreven excludestechnical aspects making theopenMINDSschemasmorehuman-readable,especiallyfor untrained eyes.Behindthescenes, within the openMINDSintegration pipeline(cf.below), this schematemplate syntaxistheninterpretedandflexiblytranslatedto various formalmetadata formats (e.g., JSON-Schema).117 +All openMINDS schemas need to have the extension **##.schema.tpl.json##** and each schema is defined as a nested associative array (dictionary) with the following conceptual structure: 118 118 119 +{{code language="json"}} 120 +{ 121 + "_type": "https://openminds.ebrains.eu/LABEL_OF_METADATA_MODEL/SCHEMA_NAME", 122 + "properties": { 123 + "PROPERTY_NAME": { 124 + "type": "DATA_TYPE", 125 + "_instruction": "METADATA_ENTRY_INSTRUCTION" 126 + }, 127 + "required": [ 128 + "PROPERTY_NAME" 129 + ] 130 +} 131 +{{/code}} 132 + 119 119 (% style="text-align: justify;" %) 120 - Despite the simplificationin comparisontoJSON-Schema,the openMINDSschemaemplatesare also,atthe core,speciallyformattedJSON files using aparticular syntax,meaningspecialkey-valuepairsthatdefinethevalidation rulesof a schema.Pleasefindin thefollowingafulldocumentation of the openMINDSschematemplatesyntax andhow it's key-valuepairsneedtobedefinedandinterpreted.134 +**##"_type"##** defines the schema type (or namespace) with the depicted naming convention, where the label of the respective openMINDS metadata model (e.g., **##"core"##**) and the schema name (format: UpperCamelCase; e.g. **##"Person"##**) have to be specified. The schema name should be meaningful and provide some insides into what metadata content the schema covers. 121 121 122 122 (% style="text-align: justify;" %) 123 - For themore inexperienced programmers,let's startby explainingfirstmegeneraltermsthatwillbelater used in the openMINDS schema template syntax specification.More experiencedprogrammerscan of courseskip theseexplanations andjumpdirectly furtherdown.137 +Under **##"properties"##** a nested associated array is defined, where each key defines the property name (format: lowerCamelCase; e.g. **##"givenName"##**) and the associated value is again a nested associated array defining the expected data **##"type"##** and the **##"_instructions"##** for entering the correct metadata for the respective property. Currently the openMINDS schema template syntax supports the following data types: **##"string, **##"integer"##**, **##"float"##**, **##"boolean"##**, **##"array"##** and **##"object"##**. Depending on the expected data type additional constraints can be made for the metadata entry of a respective property (cf. below). 124 124 125 -**What is a string, an integer, a float or a boolean?** 139 +(% style="text-align: justify;" %) 140 +Under **##"required"##** a list of property names can be provided that are obligatory to be present in a correctly instantiated metadata instance of the respective schema. If none of the properties are required, this key-value pair does not have to be specified. 126 126 127 -**What is a key-value pair?** 128 - 129 -**What is a list?** 130 - 131 -**What is a dictionary?** 132 - 133 -**What is a JSON?** 134 - 135 - 136 - 137 - 138 138 === The openMINDS integration pipeline === 139 139 140 140 (//**coming soon**//) If you'd like to learn more about the openMINDS integration pipeline, especially if you'd like to contribute to it, please get in touch with us (the openMINDS development team) via the issues on the openMINDS or openMINDS_generator GitHub or the support email: openminds@ebrains.eu