ActivityPub Viewer

A small tool to view real-world ActivityPub objects as JSON! Enter a URL or username from Mastodon or a similar service below, and we'll send a request with the right Accept header to the server to view the underlying object.

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{ "@context": [ "https://www.w3.org/ns/activitystreams", { "ostatus": "http://ostatus.org#", "atomUri": "ostatus:atomUri", "inReplyToAtomUri": "ostatus:inReplyToAtomUri", "conversation": "ostatus:conversation", "sensitive": "as:sensitive", "toot": "http://joinmastodon.org/ns#", "votersCount": "toot:votersCount", "blurhash": "toot:blurhash", "focalPoint": { "@container": "@list", "@id": "toot:focalPoint" }, "Hashtag": "as:Hashtag" } ], "id": "https://sigmoid.social/users/lysander07/statuses/112835171964449073", "type": "Note", "summary": null, "inReplyTo": null, "published": "2024-07-23T09:48:07Z", "url": "https://sigmoid.social/@lysander07/112835171964449073", "attributedTo": "https://sigmoid.social/users/lysander07", "to": [ "https://www.w3.org/ns/activitystreams#Public" ], "cc": [ "https://sigmoid.social/users/lysander07/followers", "https://sigmoid.social/users/fizise", "https://sigmoid.social/users/enorouzi", "https://fedihum.org/users/sourisnumerique" ], "sensitive": false, "atomUri": "https://sigmoid.social/users/lysander07/statuses/112835171964449073", "inReplyToAtomUri": null, "conversation": "tag:sigmoid.social,2024-07-23:objectId=37404034:objectType=Conversation", "content": "<p>In 1965, <br />Dendral, one of the first expert systems, was introduced by Edward Feigenbaum, Joshua Lederberg, and Carl Djerassi. It was was supposed to help organic chemists in identifying unknown organic molecules, by analyzing their mass spectra and using a chemistry knowledge base.</p><p><a href=\"http://web.mit.edu/6.034/www/6.s966/dendral-history.pdf\" target=\"_blank\" rel=\"nofollow noopener noreferrer\" translate=\"no\"><span class=\"invisible\">http://</span><span class=\"ellipsis\">web.mit.edu/6.034/www/6.s966/d</span><span class=\"invisible\">endral-history.pdf</span></a></p><p><a href=\"https://sigmoid.social/tags/HistoryOfAI\" class=\"mention hashtag\" rel=\"tag\">#<span>HistoryOfAI</span></a> <a href=\"https://sigmoid.social/tags/ISE2024\" class=\"mention hashtag\" rel=\"tag\">#<span>ISE2024</span></a> <a href=\"https://sigmoid.social/tags/lecture\" class=\"mention hashtag\" rel=\"tag\">#<span>lecture</span></a> <a href=\"https://sigmoid.social/tags/AI\" class=\"mention hashtag\" rel=\"tag\">#<span>AI</span></a> <a href=\"https://sigmoid.social/tags/chemistry\" class=\"mention hashtag\" rel=\"tag\">#<span>chemistry</span></a> <a href=\"https://sigmoid.social/tags/expertsystem\" class=\"mention hashtag\" rel=\"tag\">#<span>expertsystem</span></a> <span class=\"h-card\" translate=\"no\"><a href=\"https://sigmoid.social/@fizise\" class=\"u-url mention\">@<span>fizise</span></a></span> <span class=\"h-card\" translate=\"no\"><a href=\"https://sigmoid.social/@enorouzi\" class=\"u-url mention\">@<span>enorouzi</span></a></span> <span class=\"h-card\" translate=\"no\"><a href=\"https://fedihum.org/@sourisnumerique\" class=\"u-url mention\">@<span>sourisnumerique</span></a></span></p>", "contentMap": { "en": "<p>In 1965, <br />Dendral, one of the first expert systems, was introduced by Edward Feigenbaum, Joshua Lederberg, and Carl Djerassi. It was was supposed to help organic chemists in identifying unknown organic molecules, by analyzing their mass spectra and using a chemistry knowledge base.</p><p><a href=\"http://web.mit.edu/6.034/www/6.s966/dendral-history.pdf\" target=\"_blank\" rel=\"nofollow noopener noreferrer\" translate=\"no\"><span class=\"invisible\">http://</span><span class=\"ellipsis\">web.mit.edu/6.034/www/6.s966/d</span><span class=\"invisible\">endral-history.pdf</span></a></p><p><a href=\"https://sigmoid.social/tags/HistoryOfAI\" class=\"mention hashtag\" rel=\"tag\">#<span>HistoryOfAI</span></a> <a href=\"https://sigmoid.social/tags/ISE2024\" class=\"mention hashtag\" rel=\"tag\">#<span>ISE2024</span></a> <a href=\"https://sigmoid.social/tags/lecture\" class=\"mention hashtag\" rel=\"tag\">#<span>lecture</span></a> <a href=\"https://sigmoid.social/tags/AI\" class=\"mention hashtag\" rel=\"tag\">#<span>AI</span></a> <a href=\"https://sigmoid.social/tags/chemistry\" class=\"mention hashtag\" rel=\"tag\">#<span>chemistry</span></a> <a href=\"https://sigmoid.social/tags/expertsystem\" class=\"mention hashtag\" rel=\"tag\">#<span>expertsystem</span></a> <span class=\"h-card\" translate=\"no\"><a href=\"https://sigmoid.social/@fizise\" class=\"u-url mention\">@<span>fizise</span></a></span> <span class=\"h-card\" translate=\"no\"><a href=\"https://sigmoid.social/@enorouzi\" class=\"u-url mention\">@<span>enorouzi</span></a></span> <span class=\"h-card\" translate=\"no\"><a href=\"https://fedihum.org/@sourisnumerique\" class=\"u-url mention\">@<span>sourisnumerique</span></a></span></p>" }, "updated": "2024-07-23T09:48:48Z", "attachment": [ { "type": "Document", "mediaType": "image/png", "url": "https://cdn.masto.host/sigmoidsocial/media_attachments/files/112/835/151/360/190/347/original/af18a81498e6c26f.png", "name": "Slide from Information Service Engineering 2024 lecture, Basic Machione Learning 01, A very brief history of AI, Expert Systems and Knowledge Bases.\n\nThe sliude shows a Midjourney-based rendering of a chemistry expert system and contains the following text:\n1965\nDendral, one of the first expert systems was introduced by Edward Feigenbaum, Joshua Lederberg, and Carl Djerassi, which was supposed to help organic chemists in identifying unknown organic molecules, by analyzing their mass spectra and using a chemistry knowledge base.\nExpert Systems elicit specific domain knowledge from experts in form of rules.\n\nR. K. Lindsay, B. G. Buchanan, E. A. Feigenbaum, and J. Lederberg. DENDRAL: A Case Study of the First Expert System for Scientific Hypothesis Formation. Artificial Intelligence 61, 2 (1993): 209-261.\n\n\n", "blurhash": "UhO43i00_3~qxut7RjRj-;xuM{M{xuWBWBay", "focalPoint": [ 0, 0 ], "width": 2428, "height": 1366 } ], "tag": [ { "type": "Mention", "href": "https://sigmoid.social/users/fizise", "name": "@fizise" }, { "type": "Mention", "href": "https://sigmoid.social/users/enorouzi", "name": "@enorouzi" }, { "type": "Mention", "href": "https://fedihum.org/users/sourisnumerique", "name": "@sourisnumerique@fedihum.org" }, { "type": "Hashtag", "href": "https://sigmoid.social/tags/ai", "name": "#ai" }, { "type": "Hashtag", "href": "https://sigmoid.social/tags/historyofai", "name": "#historyofai" }, { "type": "Hashtag", "href": "https://sigmoid.social/tags/ise2024", "name": "#ise2024" }, { "type": "Hashtag", "href": "https://sigmoid.social/tags/lecture", "name": "#lecture" }, { "type": "Hashtag", "href": "https://sigmoid.social/tags/chemistry", "name": "#chemistry" }, { "type": "Hashtag", "href": "https://sigmoid.social/tags/expertsystem", "name": "#expertsystem" } ], "replies": { "id": "https://sigmoid.social/users/lysander07/statuses/112835171964449073/replies", "type": "Collection", "first": { "type": "CollectionPage", "next": "https://sigmoid.social/users/lysander07/statuses/112835171964449073/replies?only_other_accounts=true&page=true", "partOf": "https://sigmoid.social/users/lysander07/statuses/112835171964449073/replies", "items": [] } }, "likes": { "id": "https://sigmoid.social/users/lysander07/statuses/112835171964449073/likes", "type": "Collection", "totalItems": 3 }, "shares": { "id": "https://sigmoid.social/users/lysander07/statuses/112835171964449073/shares", "type": "Collection", "totalItems": 4 } }