Version 2.1 by maaike on 2022/06/23 16:24
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maaike 1.1 1 == Programmatic access (API) ==
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3 The EBRAINS Knowledge Graph provides convenient tools and APIs for the implementation of queries into your scripts.
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5 **Request permission**
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7 To be able to access the Knowledge Graph (KG) programmatically, you require:
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9 1. An EBRAINS account. Register for an account here: [[https:~~/~~/ebrains.eu/register/>>https://ebrains.eu/register/]]
10 1. Register and request credentials for your KG client by emailing support@ebrains.eu
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12 === Query Builder ===
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14 The query builder allows you to make, save, and reuse complex queries without any knowledge of graph query languages.
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16 Go to the Query Builder: [[https:~~/~~/query.kg.ebrains.eu>>https://query.kg.ebrains.eu/#state=6a41dd5b-3cf9-4263-8a65-83d41f27677a&session_state=638c33f5-4551-4d70-8b1d-a5c900aa62d0&code=300f25d8-caac-4576-9a21-195ccc93fd31.638c33f5-4551-4d70-8b1d-a5c900aa62d0.4214dba9-b6d0-4331-9837-3e75a10cda14]]
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18 ==== Select a category ====
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20 A query for the Knowledge Graph is always executed against a specific data structure (e.g. a "Dataset version"). First select the data structure for your query.
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22 [[image:QB1.png||alt="Step 1: Select a category" height="520" width="700"]]
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24 ==== Select an experimental approach ====
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26 Similar to the facetted filters in the Knowledge Graph Search UI, we can refine our query by defining the experimental approach of our interest, for example electrophysiology.
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28 To ensure that all dataset versions with electrophysiology are queried, and none of the dataset versions without electrophysiology, we make this property required and we apply a filter to the label we are searching for (i.e. electrophysiology).
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30 [[image:QBstep2.png||alt="Step 2: Select modality" height="541" width="700"]]
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32 ==== Select species ====
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34 Similarly, we can refine our query for mice only.
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36 [[image:QBstep3.png||alt="Step 3: Select species" height="543" width="700"]]
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38 ==== Access detailed metadata ====
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40 ==== Or code ====
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42 Code blocks can be added by using the code macro:
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44 {{code language="python"}}
45 x = 1
46 if x == 1:
47 # indented four spaces
48 print("x is 1.")
49 {{/code}}
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51 (% class="wikigeneratedid" id="HH4Won27tAppearinToC" %)
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