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From "Henning Rohde (JIRA)" <>
Subject [jira] [Updated] (BEAM-3205) Publicly document known coder wire formats and their URNs
Date Thu, 16 Nov 2017 20:15:01 GMT


Henning Rohde updated BEAM-3205:
    Labels: portability  (was: )

> Publicly document known coder wire formats and their URNs
> ---------------------------------------------------------
>                 Key: BEAM-3205
>                 URL:
>             Project: Beam
>          Issue Type: Improvement
>          Components: beam-model
>            Reporter: Kenneth Knowles
>            Assignee: Robert Bradshaw
>              Labels: portability
> Overarching issue: We need to get our Google Docs, markdown, and email threads that sketch
the Beam model as it is developed into a centralized place with clear information architecture
/ navigation, and draw the line that "if it isn't reachable from here in an obvious way it
isn't the spec". [1]
> Specific issue: Which coders are required for a runner and SDK to understand? Which coders
are otherwise considered standardized? What is the abstract specification for their wire format?
> Today we have
which is the beginning of a compliance test suite for standardized coders.
> This would really benefit from:
>  - narrative descriptions of the formats, including _abstract_ specification (not examples)
and perhaps motivation
>  - specification of which are required and which are merely "well known"
>  - ties into BEAM-3203 in terms of which coders are required to decode to compatible
value in every SDK
>  - once we have an abstract spec and some examples, and one language has robust coders
that pass the examples, we could turn it around and treat that implementation as a reference
impl for fuzz testing
> Any sort of fancy hacking that blends the tests with the narrative is fine, though mostly
I think they'll end up covering disjoint topics.
> [1] I filed BEAM-2567 and BEAM-2568 and ported,
and [~herohde] put together and

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