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13	13	=== The openMINDS umbrella ===
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16		-openMINDS is the overall umbrella for a set of integrated metadata models for describing neuroscience research products in graph databases. The correct integration of these metadata models as well as the provision of a central access point is handled by an integration pipeline. All metadata models are developed on separate GitHub repositories, in order to facilitate extensions and maintenance of existing, as well as development and integration of new openMINDS metadata models and schemas. The integration pipeline ensures that the central openMINDS GitHub repository ingests all these GitHub repositories as [[git-submodules>>https://git-scm.com/docs/git-submodule||rel="noopener noreferrer" target="_blank"]], integrates the respective metadata models and builds the openMINDS GitHub pages, as well as ZIP files containing the respective openMINDS schemas in the supported formats, such as the openMINDS syntax (cf. below), JSON-Schema, or HTML. In the following we will summarize the contents and requirements for the central openMINDS GitHub repository as well as all metadata model git-submodules. The openMINDS integration pipeline will be handled in a separate chapter (cf. below).
	16	+In summary, openMINDS is the overall umbrella for a set of distributed GitHub repositories, each defining a particular metadata model for neuroscience research products.
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19		-Let us start with the [[central openMINDS GitHub repository>>https://github.com/HumanBrainProject/openMINDS||rel=" noopener noreferrer" target="_blank"]] which has a **main branch**, a **documentation branch**, and **version branches** (naming convention: vX; e.g., v1). Official releases (naming convention: vX.Y; e.g., v1.0) are tagged and provided as release packages.
	19	+The main (or central) [[openMINDS GitHub repository>>https://github.com/HumanBrainProject/openMINDS||rel="noopener noreferrer" target="_blank"]] ingests all these GitHub repositories as [[git-submodules>>https://git-scm.com/docs/git-submodule||rel="noopener noreferrer" target="_blank"]]. Furthermore it stores the openMINDS vocabulary (**##vocab##**), providing general definitions and references for **types** and **properties** used in schemas across all openMINDS repositories (cf. below). And last but not least, it holds the schema representations for all supported metadata formats created by the openMINDS integration pipeline (cf. below).
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22		-The **main branch** hosts the general README, the LICENSE document, the CONTRIBUTING document, and the general openMINDS logo. In addition, it maintains the openMINDS vocabulary (vocab; cf. below) which provides general definitions and references for schema types and properties used across all openMINDS metadata models and their versions, as well as the bash script that builds the content of the documentation and version branches.
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25		-The **documentation** branch hosts the HTML files that build the [[openMINDS GitHub pages>>https://humanbrainproject.github.io/openMINDS/||rel=" noopener noreferrer" target="_blank"]], as well as a ZIP file for each version branch and official release containing the respective openMINDS schemas in the currently supported formats, such as the openMINDS syntax (`.schema.tpl.json`; cf. below), JSON-Schema (`.schema.json`), or HTML (`.html`).
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28		-Furthermore it stores the openMINDS vocabulary (**##vocab##**), providing general definitions and references for **types** and **properties** used in schemas across all openMINDS repositories (cf. below). And last but not least, it holds the schema representations for all supported metadata formats created by the openMINDS integration pipeline (cf. below).
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31	31	For this to work smoothly for the existing, but also for all new openMINDS metadata models, the corresponding openMINDS submodules (GitHub repositories) have to meet the following requirements:
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109	109	With each new property committed to a schema of one of the openMINDS metadata models, a new entry is appended to the **##properties.json##** file, with the display label and list of schemas in which this property occurs automatically derived. The remaining attributes are initially provided with a null value. Once an entry for a property is made in the **##properties.json##** file, the values of all attributes (**##"name"##**, **##"description"##**, **##"nameForReversedLink"##**, and **##"sameAs"##**) can be manually edited, except for **##"schemas"##** which will be always automatically updated. All those manual editions will be preserved and not overwritten when the file is updated again with a new commit. In case a property is not used anymore in any of the schemas from the openMINDS metadata models, the corresponding entry in the **##properties.json##** file is marked as being deprecated (additional attribute-value pair; **##"deprecated": true##**). It only can be permanently removed from the **##properties.json##** file, if the entry is manually deleted.
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111		-=== The openMINDS syntax ===
	102	+=== The openMINDS schema template syntax ===
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114		-All openMINDS metadata models are defined using a light-weighted schema syntax. Although this schema syntax is inspired by JSON-Schema, it outsources most schema technicalities to be handled by the openMINDS integration pipeline, making the openMINDS schemas more human-readable, especially for untrained eyes.
	105	+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 by the openMINDS integration pipeline, making the openMINDS schemas more human-readable, especially for untrained eyes.
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117	117	The few remaining customized technical properties which need additional interpretation or translation to a formal schema languages (e.g. JSON-Schema) have an underscore as prefix (e.g., **##"_type"##**). Within the openMINDS integration pipeline (cf. below), the schema template syntax is interpreted, extended and flexibly translated to various formal schema languages. All further specifications of the openMINDS schema template syntax are described below.