[ https://issues.oasis-open.org/browse/ODATA-771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=59259#comment-59259 ]
Ralf Handl commented on ODATA-771:
----------------------------------
Edm.Decimal with numeric Precision and Scale was clearly inspired by the NUMBER/DECIMAL types offered by SQL databases.
The intention of adding Scale="variable" in V4 was to include decimal floating-point numbers as well.
> Exponential notation for Edm.Decimal values in JSON payloads
> ------------------------------------------------------------
>
> Key: ODATA-771
> URL: https://issues.oasis-open.org/browse/ODATA-771
> Project: OASIS Open Data Protocol (OData) TC
> Issue Type: Sub-task
> Components: OData JSON Format
> Affects Versions: V4.0_ERRATA02
> Environment: [Proposed]
> Reporter: Ralf Handl
> Fix For: V4.0_ERRATA03
>
>
> IEEE754 defines the DECFLOAT data type for high-precision decimal arithmetic. They have 16 or 34 decimal digit mantissas and exponents between -383 and +384 or -6143 and +6144.
> The correct, lossless representation of DECFLOAT values is an Edm.Decimal with unspecified precision and variable scale.
> The OData JSON Format represents Edm.Decimal values as JSON numbers, and JSON numbers allow exponential notation, so
> "VeryLittle":1.4e-6143
> should be valid in JSON payloads.
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