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Update specs/simple-serialize.md

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Danny Ryan 2019-08-14 11:07:03 -06:00 committed by GitHub
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@ -221,7 +221,7 @@ Let `value` be a self-signed container object. The convention is that the signat
Let `A` be an object derived from another object `B` by replacing some of the (possibly nested) values of `B` by their `hash_tree_root`. We say `A` is a "summary" of `B`, and that `B` is an "expansion" of `A`. Notice `hash_tree_root(A) == hash_tree_root(B)`.
We similarly define "summary types" and "expansion types". For example, [`BeaconBlock`](https://github.com/ethereum/eth2.0-specs/blob/dev/specs/core/0_beacon-chain.md#beaconblock) is an expansion type of [`BeaconBlockHeader`](https://github.com/ethereum/eth2.0-specs/blob/dev/specs/core/0_beacon-chain.md#beaconblockheader). Notice that objects expand to at most one object of a given expansion type. For example, `BeaconBlockHeader` objects uniquely expand to `BeaconBlock` objects.
We similarly define "summary types" and "expansion types". For example, [`BeaconBlock`](./core/0_beacon-chain.md#beaconblock) is an expansion type of [`BeaconBlockHeader`](./core/0_beacon-chain.md#beaconblockheader). Notice that objects expand to at most one object of a given expansion type. For example, `BeaconBlockHeader` objects uniquely expand to `BeaconBlock` objects.
## Implementations