31:[] 2f:{"title":"Cooperative Patent Classification System","cells":[{"id":0,"value":"# Cooperative Patent Classification System","pinned":false,"hidden":false,"mode":"md"},{"id":96,"value":"Thought it'd be neat to be able to explore the [Cooperative Patent Classification System](https://www.cooperativepatentclassification.org/home) in a notebook. It leverages the [Linked open EP data service](https://data.epo.org/linked-data/), currently version 0.2 \n\nClick the links to explore the hierarchy.","pinned":false,"hidden":false,"mode":"md"},{"id":102,"value":"{\n if (\n classificationNode &&\n classificationNode.broader &&\n classificationNode.broader.length > 0\n ) {\n const prevNode = classificationNode.broader[0];\n return html``;\n } else if (classificationNode !== rootNode) {\n return html``;\n } else {\n return html`

`;\n }\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":22,"value":"## ${classificationNode.label ? `${classificationNode.label}.` : \"\"} ${classificationNode.title || \"\"}","pinned":false,"hidden":false,"mode":"md"},{"id":40,"value":"html`

\n \n

`","pinned":false,"hidden":false,"mode":"ojs"},{"id":52,"value":"## Appendix","pinned":false,"hidden":false,"mode":"md"},{"id":136,"value":"*The guts of this notebook, if you are interested in how this works under the hood...*","pinned":false,"hidden":false,"mode":"md"},{"id":79,"value":"css = html`\n`","pinned":false,"hidden":false,"mode":"ojs"},{"id":150,"value":"mutable classificationNodeCache = ({})","pinned":false,"hidden":false,"mode":"ojs"},{"id":109,"value":"createOnNodeClick = (node) => (evt) => {\n evt.currentTarget.innerText = \"Loading...\";\n followNode(node);\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":56,"value":"followNode = (nodeMetadata) => {\n const { _about, label } = nodeMetadata;\n if (label in mutable classificationNodeCache) {\n console.debug(\n `Found node with label \"${label}\" in cache, skipping fetch...`\n );\n mutable classificationNode = mutable classificationNodeCache[label];\n }\n\n console.log(mutable classificationNodeCache);\n console.debug(`Fetching node with label \"${label}\"...`);\n // Convert http to https to avoid mixed content (fails to fetch)\n const resourceUri = `${_about}.json`.replace(/^http/, \"https\");\n mutable classificationNode = fetch(resourceUri)\n .then((resp) => resp.json())\n .then((data) => {\n const node = data.result.primaryTopic;\n\n // Update the cache so we don't have to fetch it again.\n mutable classificationNodeCache = Object.assign(\n {},\n mutable classificationNodeCache,\n { [node.label]: node }\n );\n return node;\n });\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":5,"value":"mutable classificationNode = rootNode","pinned":false,"hidden":false,"mode":"ojs"},{"id":126,"value":"rootNode = fetch(\n \"https://data.epo.org/linked-data/def/cpc/scheme.json\"\n)\n .then((resp) => resp.json())\n .then((data) => convertSchemeToClassification(data.result))","pinned":false,"hidden":false,"mode":"ojs"},{"id":16,"value":"// Convert root cpc:scheme a cpc:Classification object so that we can generate a recursive viz\n// Using ontology referenced here: https://data.epo.org/linked-data/documentation/cpc-ontology-overview.html\nconvertSchemeToClassification = (scheme) => ({\n broader: [],\n title: \"CPC Scheme\",\n label: \"\",\n narrower: scheme.primaryTopic.hasTopConcept\n})","pinned":false,"hidden":false,"mode":"ojs"},{"id":48,"value":"import { html } from \"@observablehq/htl\"","pinned":false,"hidden":false,"mode":"ojs"}],"files":"$W31","stdlib":"1","titling":"auto"}