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*Subject*: **[OASIS Issue Tracker] (ENERGYINTEROP-696) Mantissa and Scale throughout spec**

*From*:**OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>***To*: energyinterop@lists.oasis-open.org*Date*: Thu, 10 Feb 2022 16:44:00 +0000 (UTC)

[ https://issues.oasis-open.org/browse/ENERGYINTEROP-696?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] William Cox updated ENERGYINTEROP-696: -------------------------------------- Fix Version/s: ctsWD13 > Mantissa and Scale throughout spec > ---------------------------------- > > Key: ENERGYINTEROP-696 > URL: https://issues.oasis-open.org/browse/ENERGYINTEROP-696 > Project: OASIS Energy Interoperation TC > Issue Type: Bug > Components: cts > Affects Versions: CTSPR01 > Environment: H Walter JohnsonÂhttps://lists.oasis-open.org/archives/energyinterop-comment/202111/msg00007.html > Reporter: Toby Considine > Assignee: Toby Considine > Priority: Major > Labels: CLARITY, PREREQ > Fix For: ctsWD13 > > > |Interesting work. Thanks for the opportunity to review. Here are a few things I noticed as I read through the doc.Â > The definition of *Scale* in Table 3-3 appears to be incorrect. *Scale*Âis defined there as the *Mantissa that specifies the size of the Resource Unit* and the example given states that *megawatts*Âhas a mantissa of 6. Assuming we are working in base 10, the prefix mega- refers to the 6th power of 10 (10^6), where 6 is the EXPONENT of the number, not the mantissa. In standard scientific notation, *mantissa* refers to the digits without the 10^n part. Therefore, the definition of *scale* should be the EXPONENT of the size prefix (*mega* or 6 in the example), not the mantissa (the fractional part or *precision* of the number).Â > Â > Nevertheless, the effect of the definition of scale is correct: the example for *Size*Â(5 kW), with the explanation that the 5 is the size and 3 is the scale, makes sense, since the scale part of this is kilo-Ã (10^3) and thus the exponent (NOT the mantissa) of 5 x 10^3 is 3. But why is Size constrained to be an *integer*? Why not allow a Product to have a fractional Size (for example "0.5 MW") rather than requiring this to be expressed as *500 kW* (or even *500000 W*)?Â > Â > I'm not sure that I understand the example of *Stream Payload Mantissa* in Table 5-1, but it seems to contain the same confusion between mantissa and exponent. > Â > The definition of *Quantity Scale*Âin Table 6-2 definitely confuses mantissa and exponent.| -- This message was sent by Atlassian Jira (v8.3.3#803004)

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