Syntax	Description	Examples
`"` keyword `"`	Finds the string within quotes, including spaces. Case-insensitive. (Escape quotes inside with `\"`)	`"Hackers' Pub"`
`from:` handle	Finds content written by the specified user.	`from:hongminhee` `from:hongminhee@hollo.social`
`lang:` ISO 639-1	Finds content written in the specified language.	`lang:en`
`#` tag	Finds content with the specified tag. Case-insensitive.	`#HackersPub`
condition condition	Finds content that satisfies both conditions on either side of the space (logical AND).	`"Hackers' Pub" lang:en`
condition `OR` condition	Finds content that satisfies at least one of the conditions on either side of the OR operator (logical OR).	`#HackersPub OR "Hackers' Pub" lang:en`
`(` condition `)`	Combines the operators within the parentheses first.	`(#HackersPub OR "Hackers' Pub" OR "Hackers Pub") lang:en`

Expanding collections on delivery

julian @julian@activitypub.space

<a href="https://mitra.social/users/silverpill">@<bdi>silverpill@mitra.social</bdi></a> (and others) reference this line from the spec re: delivery: <blockquote> If a recipient is a Collection or OrderedCollection, then the server MUST dereference the collection (with the user's credentials) and discover inboxes for each item in the collection. </blockquote> — <a href="https://www.w3.org/TR/activitypub/#delivery" rel="nofollow ugc">https://www.w3.org/TR/activitypub/#delivery</a> Was there a specific use case/story that corresponded with this directive? The only commonly addressed collection I can think of is a followers collection, and: <ol></ol>

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