Changes for page Technical details
Last modified by lzehl on 2021/07/05 18:57
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... ... @@ -57,42 +57,42 @@ 57 57 === The openMINDS vocabulary === 58 58 59 59 (% style="text-align: justify;" %) 60 - Locatedunderthefolder**##vocab##**in themainopenMINDSGitHub directory, the openMINDS vocabulary issemi-automatically gathered and stored indedicatedJSON files (**##types.json##**and **##properties.json##**).TheopenMINDSintegration pipeline makes sure that both files are updated with each commit to any of theGitHubrepositories for the openMINDSmetadata models. Forthis reason, the files always contain an up-to-datelist of all schemas and propertiesin use. This setup notonly allows us tocentrally maintain general definitions and references forschema**types** and **properties**across all openMINDSmetadatamodels,butalsoto keepseveraltechnicalaspects for the openMINDSschemashidden fromthe naiveuser. How this works is explained in the following.60 +Through the integration pipeline of the openMINDS generator, the openMINDS vocabulary is automatically gathered and stored in the main openMINDS GitHub in order to centrally maintain general definitions and references for **types** and **properties** used in schemas across all openMINDS repositories. How this works is explained in the following. 61 61 62 62 (% style="text-align: justify;" %) 63 - The **##types.json##**file isanassociativearraylistingallexistingopenMINDS schemas.Foreach openMINDSschemanestedassociativearrayis createdprovidingthe respectivedisplaylabel,thegeneraldescription,and a listof referencestocorrespondingschemasofotherinitiatives:63 +Schema types and properties are stored in dedicated JSON files (**##types.json##** and **##properties.json##**) under the folder **##vocab##** located in the main openMINDS GitHub directory. Each schema type and property occurring in the openMINDS metadata models is automatically represented in those files as nested dictionaries. Here a cutout of the **##types.json##**: 64 64 65 65 {{code language="json"}} 66 66 { 67 - "OPENMINDS_SCHEMA_TYPE": { 68 - "description": "GENERAL_DESCRIPTION", 69 - "name": "DISPLAY_LABEL", 67 + ..., 68 + "https://openminds.ebrains.eu/core/Person": { 69 + "description": "Structured information on a person (alive or dead).", 70 + "name": "Person", 70 70 "translatableTo": [ 71 - " REFERENCE_TO_RELATED_SCHEMA_OF_OTHER_INITIATIVE"72 + "https://schema.org/Person" 72 72 ] 73 - } 74 + }, 75 + ... 74 74 } 75 75 {{/code}} 76 76 77 -(% style="text-align: justify;" %) 78 -With each new schema committed to one of the openMINDS metadata models, a new entry is appended to the **##types.json##** file, with the display label automatically derived from the respective schema type and the remaining attributes provided with a null value. Once an entry for a schema is made in the **##types.json##** file, all attributes (**##name##**, **##description##**, and **##translatableTo##**) can be manually edited. All manual editions will be preserved and not overwritten when the file is updated again with a new commit. In case a schema is deleted from the openMINDS metadata models, the corresponding entry in the types.json is marked as being deprecated (additional attribute; ##"deprecated": true##). It only can be permanently removed from the **##types.json##** file, if the entry is manually deleted. 79 +... and a cutout of the **##properties.json##**: 79 79 80 -(% style="text-align: justify;" %) 81 -Similar to the **##types.json##** file, the **##properties.json##** file is an associative array listing all properties across all existing openMINDS schemas. For each openMINDS property a nested associative array is created providing the respective display label, the general description, the label for displaying the reversed link of that property, the list of schemas in which the property is used, and a list of references to matching schema properties of other initiatives: 82 - 83 83 {{code language="json"}} 84 84 { 85 - "PROPERTY_NAME": { 86 - "description": "GENERAL_DESCRIPTION", 87 - "name": "DISPLAY_LABEL", 88 - "nameForReverseLink": "DISPLAY_LABEL_OF_REVERSED_LINK", 83 + ..., 84 + "givenName": { 85 + "description": "Name given to a person, including all potential middle names, but excluding the family name.", 86 + "name": "Given name", 87 + "nameForReverseLink": "Is given name of", 89 89 "sameAs": [ 90 - " REFERENCE_TO_MATCHING_SCHEMA-PROPERTY_OF_OTHER_INITIATIVE"89 + "https://schema.org/givenName" 91 91 ], 92 92 "schemas": [ 93 - " RELATIVE_PATH_TO_SCHEMA_USING_THIS_PROPERTY"92 + "core/v3/actors/person.schema.tpl.json" 94 94 ] 95 - } 94 + }, 95 + ... 96 96 } 97 97 {{/code}} 98 98 ... ... @@ -111,40 +111,30 @@ 111 111 === The openMINDS schema template syntax === 112 112 113 113 (% style="text-align: justify;" %) 114 -All openMINDS metadata models are definedusinga light-weighted schema template syntax.Althoughthis schematemplatesyntaxisinspiredbyJSON-Schema, itoutsourcesmost schematechnicalitiesto behandled intheopenMINDS integrationpipeline, making theopenMINDSschemas more human-readable, especially for untrained eyes.114 +All openMINDS metadata models use a light-weighted schema template syntax for defining the expected metadata. The correspondingly formatted schema files use the extension: **##.schema.tpl.json##**. 115 115 116 116 (% style="text-align: justify;" %) 117 - The fewremaining customizedtechnicalpropertieswhichneed additionalnterpretationortranslationtoaformal schemalanguages(e.g.JSON-Schema)have anunderscoreasprefix(e.g.,**##"_type"##**).Within the openMINDS integration pipeline (cf. below), theschema template syntax is interpreted,extendedand flexibly translated to various formalschemalanguages.Allfurther specificationsof theopenMINDSschematemplate syntax are described below.117 +Although, as the file extension suggests, this openMINDS schema template syntax is inspired by JSON-Schema, it facilitates or even excludes technical aspects making the openMINDS schemas more human-readable, especially for untrained eyes. Behind the scenes, within the openMINDS integration pipeline (cf. below), this schema template syntax is then interpreted and flexibly translated to various formal metadata formats (e.g., JSON-Schema). 118 118 119 119 (% style="text-align: justify;" %) 120 - All openMINDSschemasneedto have the extension**##.schema.tpl.json##**andeachschema isdefinedasanestedassociative array(dictionary)with the following conceptual structure:120 +Despite the simplification in comparison to JSON-Schema, the openMINDS schema templates are also, at the core, specially formatted JSON files using a particular syntax, meaning special key-value pairs that define the validation rules of a schema. Please find in the following a full documentation of the openMINDS schema template syntax and how it's key-value pairs need to be defined and interpreted. 121 121 122 -{{code language="json"}} 123 -{ 124 - "_type": "https://openminds.ebrains.eu/LABEL_OF_METADATA_MODEL/SCHEMA_NAME", 125 - "properties": { 126 - "PROPERTY_NAME": { 127 - "type": "DATA_TYPE", 128 - "_instruction": "METADATA_ENTRY_INSTRUCTION" 129 - }, 130 - "required": [ 131 - "PROPERTY_NAME" 132 - ] 133 -} 134 -{{/code}} 135 - 136 136 (% style="text-align: justify;" %) 137 - **##"_type"##**defines theschematype (ornamespace)withthedepictednamingconvention,where thelabeloftheespective openMINDSmetadatamodel(e.g.,**##"core"##**) andtheschemaame(format:UpperCamelCase;e.g. **##"Person"##**)havetobe specified.Obviously, the schema nameshould bemeaningfuland providesome insidesinto what metadatacontenttheschema covers.123 +For the more inexperienced programmers, let's start by explaining first some general terms that will be later used in the openMINDS schema template syntax specification. More experienced programmers can of course skip these explanations and jump directly further down. 138 138 139 -(% style="text-align: justify;" %) 140 -Under **##"properties"##** a nested associative array is defined, where each key defines the property name (format: lowerCamelCase; e.g. **##"givenName"##**). The corresponding value is again a nested associative array defining the expected data **##"type"##** (cf. below) and the **##"_instructions"##** for entering the correct metadata for the respective property. 125 +**What is a string, an integer, a float or a boolean?** 141 141 142 -(% style="text-align: justify;" %) 143 -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. 127 +**What is a key-value pair?** 144 144 145 -(% style="text-align: justify;" %) 146 -Now, depending on the expected data type additional constraints can be made for the metadata entry of a respective property. Currently, the openMINDS schema template syntax supports the following data types: **##"string"##**, ##**"integer"**##, **##"float"##**, **##"boolean"##**, **##"array"##** and **##"object"##**. 129 +**What is a list?** 147 147 131 +**What is a dictionary?** 132 + 133 +**What is a JSON?** 134 + 135 + 136 + 137 + 148 148 === The openMINDS integration pipeline === 149 149 150 150 (//**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