<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;">Dear all</p><p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"><br></p><p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;">As discussed this morning in the TCG, here is a suggestion about Data Source vocabulary: </p><p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"><br></p>
<p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;">The current proposal distinguishes: Artificial / Observation / Theory</p>
<p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Times; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"><span style="font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 13px; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;">- The distinction between "</span><span style="font-kerning: none">modelling the world without reference to specific individual world objects</span><span style="font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 13px; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;">" and "</span><span style="font-kerning: none">predicting observations of specific individual world objects</span><span style="font-style: normal; font-variant-caps: normal; font-stretch: normal; font-size: 13px; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;">" is probably not relevant in many cases.</span></p>
<p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;">- The need to distinguish observations from made-up data is common to every field (associated to the opposition noise vs modeling uncertainty)</p>
<p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;">- The need to distinguish data with physical content from 'artificial' data is also sensible, although the distinction may depend on the discipline</p>
<p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;">- It is stressed that the word "Theory" is often misleading in the VO (at least another similar comment this morning!) — in most cases it refers to computations / modeling, which is different and more specific</p>
<p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal; min-height: 17px;"><br></p>
<p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;">Proposal (not yet formalized)</p>
<p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;">- "Observation" is reserved to actual measurements and derived data. This includes made up samples in the lab, which implies that another level is available to characterize the source itself (lab measurements in general are often distinguished with Experimental, as opposed to Observation)</p>
<p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;">- "Modeled" refers to computed data generalizing observations — typically large models (universe, planetary / stellar atmospheres or interiors…), which are explored to grab scientific meaning. This includes the current case of no attempt to simulate existing objects, but not only (also models with parameters tuned to fit the real world).</p>
<p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;">- "Simulation" refers to mock-up data with mostly practical value, typically much less computation-intensive (ie : simulation of an instrument output, first level simulation of a source, etc). According to this definition, this is where you would find properties averaged over a class of objects (eg. stellar class spectra, asteroid type spectra) — which is debatable (but those are often difficult to characterize, as there is no associated source)</p>
<p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal; min-height: 17px;"><br></p><p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal; min-height: 17px;">But I stress that the need to have both Modeled and Simulation has to be demonstrated, especially if the distinction ifs not always clear and obvious.</p><p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal; min-height: 17px;"><br></p><p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal; min-height: 17px;">Best wishes</p><p style="margin: 0px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Bear Sans UI"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal; min-height: 17px;">Stéphane</p></body></html>