20 lines
788 B
Markdown
20 lines
788 B
Markdown
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+++
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A Collection is an Object that has `items` or `orderedItems`
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however, `orderedItems` is valid on both Collection and OrderedCollection! it is defined like this in the as2 context:
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```json
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"orderedItems": {
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"@id": "as:items",
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"@type": "@id",
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"@container": "@list"
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}
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```
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so it is basically just an alias for `items` where it MUST be an array, and the array's order matters. (if it were `@container: set`, then it MUST be an array, but the array's order does not matter.)
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### tangent: a Collection may be ordered without being an OrderedCollection
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OrderedCollection is defined as strictly reverse chronological by ActivityPub. however, other orderings are valid on regular Collections. the use of the `orderedItems` term allows plain-JSON implementations to do exactly this.
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