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    At some point in the discussion of singles & doubles, I ask as
    to the applicability of these discussions to the current V3.x
    standard or a future V4.x standard. It was answered that the
    discussion was for V3.x.<br>
    <br>
    <br>
    Leonard Daly<br>
    <br>
    <br>
    <br>
    <blockquote type="cite"
      cite="mid:007801d2ce69$edb02e40$c9108ac0$@ntlworld.com">
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        <p class="MsoNormal">Attendees:  Roy Walmsley, Leonard Daly,
          Anita Havele, Vince Marchetti, Don Brutzman, Dick Puk,
          Michalis Kamburelis, <o:p></o:p></p>
        <p class="MsoNormal">Apologies received: <o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">=======================================================================================================<o:p></o:p></p>
        <p class="MsoNormal"><span style="color:windowtext"><o:p> </o:p></span></p>
        <p class="MsoNormal">Preliminary: <b><u>Welcome, and
              introductions, as necessary<o:p></o:p></u></b></p>
        <p class="MsoNormal" style="margin-left:36.0pt">Roy welcomed
          everyone. No introductions were needed.<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">=======================================================================================================<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">Primary discussion topic: <b><u>SFString
              and MFString in the XML encoding – which quotation marks
              should be accepted?<o:p></o:p></u></b></p>
        <p class="MsoNormal">Ancillary topic: <b><u>MFxxxx fields – use
              of commas as value separators<o:p></o:p></u></b></p>
        <p class="MsoNormal"><b><u><o:p><span
                  style="text-decoration:none"> </span></o:p></u></b></p>
        <p class="MsoNormal"
          style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l1
          level1 lfo3"><!--[if !supportLists]--><span
            style="font-family:Symbol"><span style="mso-list:Ignore">·<span
                style="font:7.0pt "Times New Roman"">        
              </span></span></span><!--[endif]-->Introduction: Review of
          current and reference standards, led by the meeting chair<o:p></o:p></p>
        <p class="MsoNormal"
          style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l1
          level2 lfo3"><!--[if !supportLists]--><span
            style="font-family:"Courier New""><span
              style="mso-list:Ignore">o<span style="font:7.0pt
                "Times New Roman"">   </span></span></span><!--[endif]-->ISO/IEC
          19775-1:2013 clause 5.3.14 SFString and SFString (<a
href="http://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/fieldsDef.html#SFStringAndMFString"
            moz-do-not-send="true">http://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/fieldsDef.html#SFStringAndMFString</a>)<o:p></o:p></p>
        <p class="MsoNormal"
          style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l1
          level2 lfo3"><!--[if !supportLists]--><span
            style="font-family:"Courier New""><span
              style="mso-list:Ignore">o<span style="font:7.0pt
                "Times New Roman"">   </span></span></span><!--[endif]-->ISO/IEC
          19776-2:2015 clause 5.1.2 Description (<a
href="http://www.web3d.org/documents/specifications/19776-2/V3.3/Part02/EncodingOfFields.html#Description"
            moz-do-not-send="true">http://www.web3d.org/documents/specifications/19776-2/V3.3/Part02/EncodingOfFields.html#Description</a>)<o:p></o:p></p>
        <p class="MsoNormal"
          style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l1
          level2 lfo3"><!--[if !supportLists]--><span
            style="font-family:"Courier New""><span
              style="mso-list:Ignore">o<span style="font:7.0pt
                "Times New Roman"">   </span></span></span><!--[endif]-->ISO/IEC
          19776-2:2015 clause 5.15 SFString and MFString (<a
href="http://www.web3d.org/documents/specifications/19776-2/V3.3/Part02/EncodingOfFields.html#SFString"
            moz-do-not-send="true">http://www.web3d.org/documents/specifications/19776-2/V3.3/Part02/EncodingOfFields.html#SFString</a>)<o:p></o:p></p>
        <p class="MsoNormal"
          style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l1
          level2 lfo3"><!--[if !supportLists]--><span
            style="font-family:"Courier New""><span
              style="mso-list:Ignore">o<span style="font:7.0pt
                "Times New Roman"">   </span></span></span><!--[endif]-->ISO/IEC
          19776-2:2015 clause A.4 Fields (<a
href="http://www.web3d.org/documents/specifications/19776-2/V3.3/Part02/grammar.html#Fields"
            moz-do-not-send="true">http://www.web3d.org/documents/specifications/19776-2/V3.3/Part02/grammar.html#Fields</a>)<o:p></o:p></p>
        <p class="MsoNormal"
          style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l1
          level2 lfo3"><!--[if !supportLists]--><span
            style="font-family:"Courier New""><span
              style="mso-list:Ignore">o<span style="font:7.0pt
                "Times New Roman"">   </span></span></span><!--[endif]-->Introducing
          JSON (<a href="http://www.json.org/" moz-do-not-send="true">http://www.json.org/</a>)<o:p></o:p></p>
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          level2 lfo3"><!--[if !supportLists]--><span
            style="font-family:"Courier New""><span
              style="mso-list:Ignore">o<span style="font:7.0pt
                "Times New Roman"">   </span></span></span><!--[endif]-->ISO/IEC
          19776-1:2015 clause 5.1.2 Description (<a
href="http://www.web3d.org/documents/specifications/19776-1/V3.3/Part01/EncodingOfFields.html#5.1.2"
            moz-do-not-send="true">http://www.web3d.org/documents/specifications/19776-1/V3.3/Part01/EncodingOfFields.html#5.1.2</a>)<o:p></o:p></p>
        <p class="MsoNormal"
          style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l1
          level2 lfo3"><!--[if !supportLists]--><span
            style="font-family:"Courier New""><span
              style="mso-list:Ignore">o<span style="font:7.0pt
                "Times New Roman"">   </span></span></span><!--[endif]-->ISO/IEC
          19776-1:2016 clause 5.15 SFString and MFString (<a
href="http://www.web3d.org/documents/specifications/19776-1/V3.3/Part01/EncodingOfFields.html#SFString"
            moz-do-not-send="true">http://www.web3d.org/documents/specifications/19776-1/V3.3/Part01/EncodingOfFields.html#SFString</a>)<o:p></o:p></p>
        <p class="MsoNormal"
          style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l1
          level2 lfo3"><!--[if !supportLists]--><span
            style="font-family:"Courier New""><span
              style="mso-list:Ignore">o<span style="font:7.0pt
                "Times New Roman"">   </span></span></span><!--[endif]-->HTML
          5.1 W3C Recommendation, 1 November 2016, clause 8.1.2.3
          Attributes (<a
            href="https://www.w3.org/TR/html/syntax.html#elements-attributes"
            moz-do-not-send="true">https://www.w3.org/TR/html/syntax.html#elements-attributes</a>)<o:p></o:p></p>
        <p class="MsoNormal"
          style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l1
          level2 lfo3"><!--[if !supportLists]--><span
            style="font-family:"Courier New""><span
              style="mso-list:Ignore">o<span style="font:7.0pt
                "Times New Roman"">   </span></span></span><!--[endif]-->HTML
          5.1 W3C Recommendation, 1 November 2016, clause 9.1 Writing
          XHTML documents (<a
            href="https://www.w3.org/TR/html/xhtml.html#writing-xhtml-documents"
            moz-do-not-send="true">https://www.w3.org/TR/html/xhtml.html#writing-xhtml-documents</a>)<o:p></o:p></p>
        <p class="MsoNormal"
          style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l1
          level2 lfo3"><!--[if !supportLists]--><span
            style="font-family:"Courier New""><span
              style="mso-list:Ignore">o<span style="font:7.0pt
                "Times New Roman"">   </span></span></span><!--[endif]-->Extensible
          Markup Language (XML) 1.1 W3C Recommendation 4 February 2004,
          clause 2.3 Common Syntactic Constructs [10] AttValue (<a
            href="https://www.w3.org/TR/2004/REC-xml11-20040204/#NT-AttValue"
            moz-do-not-send="true">https://www.w3.org/TR/2004/REC-xml11-20040204/#NT-AttValue</a>)<o:p></o:p></p>
        <p class="MsoListParagraph" style="margin-left:72.0pt"><o:p> </o:p></p>
        <p class="MsoListParagraph" style="margin-left:54.0pt">Roy
          opened the discussion with a short review of each of the above
          references. The reference from ISO/IEC 19775-1 did not have
          specific impact on the discussions. The next three references
          from ISO/IEC 19776-2, the Classic VRML encoding, define a
          string to be have double quotation marks (“), and MFStrings to
          be an array of strings enclosed in square brackets as array
          delimiters. Furthermore, an MFString with a single element
          does not require the square brackets. This principle, of not
          requiring square brackets for a single value, applies to all
          MFxxxx fields. The next two references, from ISO/IEC 19776-1,
          the XML encoding, define a string to have double quotation
          marks(“) and MFStrings to be an array of strings in single
          quotes (‘). The remaining three HTML and XML references define
          attribute values to be enclosed in either double quotes(“) or
          single quotes(‘).<o:p></o:p></p>
        <p class="MsoListParagraph" style="margin-left:54.0pt"><o:p> </o:p></p>
        <p class="MsoListParagraph" style="margin-left:54.0pt">Don
          highlighted the existing Mantis issue on this topic that
          collects some comments. This is issue 1091 - <a
            href="http://www.web3d.org/member-only/mantis/view.php?id=1091"
            moz-do-not-send="true">http://www.web3d.org/member-only/mantis/view.php?id=1091</a>
          – entitled “Confusion between XML and X3D syntax for
          SFString”. The related Mantis issues 705 - <a
            href="http://www.web3d.org/member-only/mantis/view.php?id=705"
            moz-do-not-send="true">http://www.web3d.org/member-only/mantis/view.php?id=705</a>
          – entitled “Escaping backslashes” and 488 - <a
            href="http://www.web3d.org/member-only/mantis/view.php?id=488"
            moz-do-not-send="true">http://www.web3d.org/member-only/mantis/view.php?id=488</a>
          – entitled “Handling of quotation marks” were also noted.<o:p></o:p></p>
        <p class="MsoListParagraph" style="margin-left:54.0pt"><o:p> </o:p></p>
        <p class="MsoListParagraph" style="margin-left:54.0pt">Need to
          be careful with specifying what we mean by “double quotes” and
          “single quotes” or “apostrophes”. See <a
            href="https://www.w3.org/TR/REC-xml/#sec-common-syn"
            moz-do-not-send="true">https://www.w3.org/TR/REC-xml/#sec-common-syn</a>
          and <a href="https://dev.w3.org/html5/html-author/charref"
            moz-do-not-send="true">https://dev.w3.org/html5/html-author/charref</a>
          for XML standard. Michalis provided references to clarify this
          – see <a
href="http://web3d.org/pipermail/x3d-public_web3d.org/2017-May/006674.html"
            moz-do-not-send="true">http://web3d.org/pipermail/x3d-public_web3d.org/2017-May/006674.html</a>.<o:p></o:p></p>
        <p class="MsoListParagraph" style="margin-left:54.0pt"><o:p> </o:p></p>
        <p class="MsoListParagraph" style="margin-left:54.0pt">The
          question was also raised about whether the requirement in the
          XML encoding for an MFString with a single value to be encoded
          using two sets of quotation marks could be relaxed, in effect
          dropping the outer set of quotes, just as the Classic VRML
          encoding drops the array square brackets.<o:p></o:p></p>
        <p class="MsoListParagraph" style="margin-left:54.0pt"><o:p> </o:p></p>
        <p class="MsoListParagraph" style="margin-left:54.0pt">The need
          for backslash escaping was described. They are needed in the
          XML encoding because there is both an XML parser and an X3D
          parser. The question of whether there should be a difference
          between SFString and MFString escaping requirements was
          raised. Michalis reported that some implementations do not
          recognize escape sequences in SFString values – see <a
href="http://web3d.org/pipermail/x3d-public_web3d.org/2017-May/006690.html"
            moz-do-not-send="true">http://web3d.org/pipermail/x3d-public_web3d.org/2017-May/006690.html</a>.<o:p></o:p></p>
        <p class="MsoListParagraph" style="margin-left:54.0pt"><o:p> </o:p></p>
        <p class="MsoListParagraph" style="margin-left:54.0pt">Michalis
          noted that the X3D XML encoding is specific about what
          quotation marks to use, compared to XML. He suggested X3D
          should permit either sets of quotes, to match the XML / HTML
          standards. There was general agreement that the specific X3D
          requirements should be relaxed to match the XML specification
          for string attributes.<o:p></o:p></p>
        <p class="MsoListParagraph" style="margin-left:54.0pt"><o:p> </o:p></p>
        <p class="MsoListParagraph" style="margin-left:54.0pt">It was
          agreed that escape sequences are indeed required for
          MFStrings, but are not be required for SFStrings. <o:p></o:p></p>
        <p class="MsoListParagraph" style="margin-left:54.0pt"><o:p> </o:p></p>
        <p class="MsoNormal" style="margin-left:54.0pt">It was proposed
          that alternative text for clause 5.15 in ISO/IEC 19776-1
          should be written. During the discussion, there was a large
          number of e-mail exchanges on the public list, all stemming
          from the meeting agenda at <a
href="http://web3d.org/pipermail/x3d-public_web3d.org/2017-May/006643.html"
            moz-do-not-send="true">http://web3d.org/pipermail/x3d-public_web3d.org/2017-May/006643.html</a>.
          At the end of the meeting discussions Don and Michalis agreed
          to put forward new text for consideration.<o:p></o:p></p>
        <p class="MsoNormal" style="margin-left:36.0pt"><o:p> </o:p></p>
        <p class="MsoNormal">=======================================================================================================<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">Close of Meeting: <b><u>Thanks for
              participating and contributing<o:p></o:p></u></b></p>
        <p class="MsoNormal"><b><u><o:p><span
                  style="text-decoration:none"> </span></o:p></u></b></p>
        <p class="MsoNormal" style="margin-left:36.0pt">Roy thanked
          everyone for their time to participate and the passionate
          contributions to the debate.<o:p></o:p></p>
        <p class="MsoNormal"><b><u><o:p><span
                  style="text-decoration:none"> </span></o:p></u></b></p>
        <p class="MsoNormal">Roy Walmsley<o:p></o:p></p>
        <p class="MsoNormal">X3D WG co-chair<o:p></o:p></p>
        <p class="MsoNormal"><span style="color:windowtext"><o:p> </o:p></span></p>
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      <br>
      <pre wrap="">_______________________________________________
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</pre>
    </blockquote>
    <p><br>
    </p>
    <div class="moz-signature">-- <br>
      <font class="tahoma,arial,helvetica san serif" color="#333366">
        <font size="+1"><b>Leonard Daly</b></font><br>
        3D Systems & Cloud Consultant<br>
        LA ACM SIGGRAPH Chair<br>
        President, Daly Realism - <i>Creating the Future</i>
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