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Schematic
Summary
SCHEMATIC is an acronym for Schema Engine for Manifest Ingress and Curation. The Python based infrastructure provides a novel schema-based, metadata ingress ecosystem, that is meant to streamline the process of biomedical dataset annotation, metadata validation and submission to a data repository for various data contributors.
Documentation
Code in Github
https://github.com/Sage-Bionetworks/schematic
Installation
https://pypi.org/project/schematicpy/
pip install schematicpy
Requires Python version 3.10.*
Install for data curator app:
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python3 -m venv .venv
source .venv/bin/activate
python3 -m pip install schematicpy |
Edit Configuration
config.yml:
https://github.com/Sage-Bionetworks/schematic/blob/develop/config.yml
Initalize
schematic init -c ~/GitHub/schematic/config.yml
SchemaHub
/wiki/spaces/SCHEM/pages/2453176326
/wiki/spaces/SCHEM/pages/2458419217
/wiki/spaces/SCHEM/pages/2967568387
Install Schematic
Schematic will run on Python 3.10. We must control the Pytheon Python Environment. PyEnv is one option., https://fathomtech.io/blog/python-environments-with-pyenv-and-vitualenv/
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pyenv install 3.10.11 pyenv virtualenv 3.10.11 schematic_3_10_11 pyenv activate schematic_3_10_11 pyenv -m pip install schematic_3_10_11 pip install schematicpy |
Data model visualizer?
Build a Data Model
/wiki/spaces/SCHEM/pages/2473623559
Data Model Workshop
https://docs.google.com/presentation/d/129pSx58qDm7Y1OQmSSHKDq6tsoD3pW_gDRNXiX2rd0w/edit#slide=id.g13aaf3b8358_0_0
Diagramming - draw out model
Lucid.app - can use templates like ERD example
Can reference diagram when building data model
Schema visualization tool ( data viz collaboration opportunity Rich!!)
Start small - skeleton --> schema
Definitions on /wiki/spaces/SCHEM/pages/2473623559
Manifest - metadata table submitted for datasets
Data Model -
Data Schema -
Start from single table
CSV with basic column set: Attribute, Description, ValidValues, DependsOn, required, source, parent, properties, dependsOnComponent, validationRules
Use schematic in dev mode to conver model to JSON-LD regularly to check for errors
https://ontofox.hegroup.org/
Namespace collisions - should use "Biothings" schema
graph modeling requires unique names. some protected names too. no underscores.
Schematic dev mode helps find and deal with erors by iteratively checking JSON-LD
Generate JSON-LDF from CSV: schematic schema convert data_model.csv
`schematic model --config config.hyml submit --manifest_path manifest.csv --datset_id synId -- manifest_record_type table
JSON for Linking Data JSON-LD
JSON
https://cambridgesemantics.com/blog/semantic-university/learn-rdf/rdf-nuts-bolts-2/
One reason we use JSON-LD in schematic is its support by http://schema.org : https://schema.org/
And a reason for http://schema.org is dataset discoverability: https://datasetsearch.research.google.com/
JSON-LD useful for search engines (http://schema.org )
for anyone who wants to learn more about "linked data”, reading about ideas related to "semantic web" can be a fun rabbit hole to go down…w3 stds
Error Troubleshooting
SchemaHub Documentation on Confluence. This includes definitions of data model like validation rules
Github Tickets Sage-Bionetworks/schematic
Add ticket workflow
Click on Issue
Issue: Feature Request
Add title
Describe problem and a potential solution
Importance
Timeline
Additional Context
Attach any needed documents or screenshots
blah: [e.g. chrome, safari]
ca
Create a data model formatted as a CSV
Where is the reference to how data model needs to be formatted?
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schematic schema convert input.csv output.jsonld
Guide to Developing Data Models in JSON-LD
JSON-LD, or JavaScript Object Notation for Linked Data, is a JSON-based format for serializing Linked Data. It extends JSON with additional functionality to represent linked data structures, such as contexts, @id, and @type. JSON-LD is a lightweight and flexible format that can be used to represent a variety of data models.
This guide provides an introduction to developing data models in JSON-LD. It covers the following topics:
JSON-LD syntax
JSON-LD contexts
Modeling entities and relationships
Using vocabularies
Best practices for developing JSON-LD data models
JSON-LD Syntax
JSON-LD documents are valid JSON documents. They consist of key-value pairs, where the keys are strings and the values can be strings, numbers, objects, arrays, or booleans. JSON-LD documents can also contain additional keywords that provide additional information about the data.
The following is an example of a simple JSON-LD document:
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JSON{
"@context": "https://schema.org/",
"@id": "http://example.com/book1",
"type": "Book",
"name": "The Hitchhiker's Guide to the Galaxy",
"author": "Douglas Adams"
}
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This document describes a book with the following properties:
@context
: The context URI specifies the vocabulary that is used to interpret the data. In this case, the vocabulary is http://Schema.org .@id
: The@id
property uniquely identifies the resource. In this case, the resource is a book.type
: Thetype
property specifies the type of the resource. In this case, the resource is a book.name
: Thename
property specifies the name of the book.author
: Theauthor
property specifies the author of the book.
JSON-LD Contexts
JSON-LD contexts are used to map IRIs (Internationalized Resource Identifiers) to human-readable names. Contexts can also be used to define prefixes for IRIs. This can make JSON-LD documents easier to read and write.
The @context
property in a JSON-LD document specifies a context URI. When a JSON-LD processor encounters an IRI in a document, it uses the context to resolve the IRI to a human-readable name.
For example, the following context defines a prefix for the http://Schema.org vocabulary:
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JSON{
"@context": {
"schema": "https://schema.org/"
}
}
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Using this context, the following JSON-LD document can be interpreted:
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JSON{
"@context": {
"schema": "https://schema.org/"
},
"@id": "http://example.com/book1",
"type": "schema:Book",
"name": "The Hitchhiker's Guide to the Galaxy",
"author": "Douglas Adams"
}
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The type
property is now prefixed with schema:
. This makes the document easier to read and understand.
Modeling Entities and Relationships
Entities in a JSON-LD data model are represented by objects. Relationships between entities are represented by properties. For example, the following JSON-LD document describes a book and a person:
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JSON{
"@context": {
"schema": "https://schema.org/"
},
"@id": "http://example.com/book1",
"type": "schema:Book",
"name": "The Hitchhiker's Guide to the Galaxy",
"author": {
"@id": "http://example.com/douglas-adams",
"type": "schema:Person",
"name": "Douglas Adams"
}
}
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The author
property in the book
object refers to the person
object. This indicates that Douglas Adams is the author of The Hitchhiker's Guide to the Galaxy.
Using Vocabularies
Vocabularies are collections of terms and definitions that are used to describe data. JSON-LD data models can use vocabularies to provide a common understanding of the data.
There are many different vocabularies available. Some popular vocabularies include:
Dublin Core
Friend of a Friend (FOAF)
GoodRelations
GeoNames
MusicBrainz
When developing a JSON-LD data model, it is important to choose the appropriate vocabulary. The vocabulary should be relevant to the type of data that you are modeling.
**Best Practices
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