From 2e16135ea6e9eeecd7fbcc858f99121722da970b Mon Sep 17 00:00:00 2001
From: "Karl O. Pinc kop@karlpinc.com" <kop@karlpinc.com>
Date: Mon, 29 Jun 2026 23:03:50 +0000
Subject: [PATCH] Update key with graphics useful for view diagramming

---
 doc/diagrams/key.svg | 483 +++++++++++++++++++++++++++++++++----------
 1 file changed, 378 insertions(+), 105 deletions(-)

diff --git a/doc/diagrams/key.svg b/doc/diagrams/key.svg
index 578c48d..9f1249a 100644
--- a/doc/diagrams/key.svg
+++ b/doc/diagrams/key.svg
@@ -1,11 +1,11 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <svg
-   width="140mm"
-   height="110mm"
-   viewBox="0 0 140 110"
+   width="140.66499mm"
+   height="144.265mm"
+   viewBox="0 0 140.66499 144.265"
    version="1.1"
    id="svg1323"
-   inkscape:version="1.1.2 (0a00cf5339, 2022-02-04)"
+   inkscape:version="1.2.2 (b0a8486541, 2022-12-01)"
    sodipodi:docname="key.svg"
    inkscape:export-filename="../../../../../../../tmp/key.png"
    inkscape:export-xdpi="96"
@@ -730,6 +730,142 @@
          style="fill:context-stroke;fill-rule:evenodd;stroke:none"
          id="arrow2L-6-9-1" />
     </marker>
+    <marker
+       markerWidth="27.278261"
+       markerHeight="12.289958"
+       refX="13.639131"
+       refY="6.144979"
+       orient="auto"
+       id="marker9849-5"
+       viewBox="0 0 27.278262 12.289958"
+       preserveAspectRatio="xMidYMid">
+      <g
+         id="g9791-3-3"
+         transform="matrix(3.7795276,0,0,3.7795276,-224.43554,-449.7519)">
+        <rect
+           style="fill:#000000;fill-opacity:0;stroke:none;stroke-width:0.358077;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:0.98995"
+           id="rect3833-8-5-1-9-5"
+           width="7.2173734"
+           height="3.251718"
+           x="59.381905"
+           y="118.99686" />
+        <g
+           id="g9780-1-6">
+          <ellipse
+             style="opacity:0;fill:#000000;fill-opacity:0;stroke:#000000;stroke-width:0.0637164;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+             id="path975-7-8-3-2-8-4-6-4-9-2"
+             cx="-61.21767"
+             cy="120.63875"
+             rx="0.86231267"
+             ry="0.86887383"
+             transform="scale(-1,1)" />
+          <g
+             id="g9771-6-9">
+            <g
+               id="g8984-93-1">
+              <path
+                 style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.230263;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:0.98995"
+                 d="m 61.642067,120.59522 1.367563,0.0216"
+                 id="path3823-7-2-1-3-2" />
+              <path
+                 style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.230263;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:0.98995"
+                 d="m 61.674738,120.60096 1.3028,-0.84233"
+                 id="path3829-8-6-7-8-7" />
+              <path
+                 style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.230263;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:0.98995"
+                 d="m 61.676255,120.59972 1.317565,0.8867"
+                 id="path3831-68-1-7-0-0" />
+            </g>
+          </g>
+          <ellipse
+             style="fill:#feffff;fill-opacity:1;stroke:#000000;stroke-width:0.309625;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+             id="path977-8-5-8-2-9-4-1-9-5-9"
+             cy="120.6"
+             cx="-61.200001"
+             rx="0.65287793"
+             ry="0.65784538"
+             transform="scale(-1,1)" />
+        </g>
+      </g>
+    </marker>
+    <marker
+       markerWidth="13.766983"
+       markerHeight="13.61952"
+       refX="6.8834925"
+       refY="6.8097606"
+       orient="auto"
+       id="marker8348-5-2"
+       viewBox="0 0 13.766985 13.619522"
+       preserveAspectRatio="xMidYMid">
+      <g
+         id="g8318-0-0-9"
+         transform="matrix(3.7795276,0,0,3.7795276,-272.14221,-394.6151)">
+        <ellipse
+           style="opacity:0;fill:#ff2a2a;fill-opacity:0.000380632;stroke:#000000;stroke-width:0.127443;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:0.98995"
+           id="path975-7-8-3-28-8-2-3"
+           cx="73.792641"
+           cy="106.21033"
+           rx="1.7246252"
+           ry="1.7380277" />
+        <ellipse
+           style="fill:#ffffff;fill-opacity:1;stroke:#000000;stroke-width:0.132134;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:0.98995"
+           id="path977-8-5-8-9-5-9-1"
+           cy="106.21033"
+           cx="74.686691"
+           rx="0.89405036"
+           ry="0.900998" />
+      </g>
+    </marker>
+    <marker
+       markerWidth="5.4656734"
+       markerHeight="7.2566509"
+       refX="5"
+       refY="3.6283257"
+       orient="auto"
+       id="marker4751-9"
+       viewBox="0 0 5.4656738 7.2566516"
+       preserveAspectRatio="xMidYMid">
+      <g
+         id="g9771-5-20-4"
+         transform="matrix(3.7795276,0,0,3.7795276,-232.86416,-452.26563)"
+         style="display:inline">
+        <g
+           id="g8984-6-2-7">
+          <path
+             style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.230263;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:0.98995"
+             d="m 61.642067,120.59522 1.367563,0.0216"
+             id="path3823-7-2-1-2-37-8" />
+          <path
+             style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.230263;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:0.98995"
+             d="m 61.674738,120.60096 1.3028,-0.84233"
+             id="path3829-8-6-7-9-5-4" />
+          <path
+             style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.230263;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:0.98995"
+             d="m 61.676255,120.59972 1.317565,0.8867"
+             id="path3831-68-1-7-1-92-5" />
+        </g>
+      </g>
+      <g
+         id="g9771-5-0-2-0"
+         transform="matrix(3.7795276,0,0,3.7795276,-232.86416,-452.26563)"
+         style="display:inline">
+        <g
+           id="g8984-6-9-8-3">
+          <path
+             style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.230263;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:0.98995"
+             d="m 61.642067,120.59522 1.367563,0.0216"
+             id="path3823-7-2-1-2-3-9-6" />
+          <path
+             style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.230263;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:0.98995"
+             d="m 61.674738,120.60096 1.3028,-0.84233"
+             id="path3829-8-6-7-9-6-7-1" />
+          <path
+             style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.230263;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:0.98995"
+             d="m 61.676255,120.59972 1.317565,0.8867"
+             id="path3831-68-1-7-1-0-3-0" />
+        </g>
+      </g>
+    </marker>
   </defs>
   <sodipodi:namedview
      id="base"
@@ -739,17 +875,17 @@
      inkscape:pageopacity="0.0"
      inkscape:pageshadow="2"
      inkscape:zoom="2.0000001"
-     inkscape:cx="182.5"
-     inkscape:cy="274.99999"
+     inkscape:cx="291.99999"
+     inkscape:cy="396.24998"
      inkscape:document-units="mm"
      inkscape:current-layer="layer3"
      inkscape:document-rotation="0"
      showgrid="true"
      units="in"
-     inkscape:window-width="2048"
-     inkscape:window-height="1223"
-     inkscape:window-x="0"
-     inkscape:window-y="28"
+     inkscape:window-width="1920"
+     inkscape:window-height="1176"
+     inkscape:window-x="1920"
+     inkscape:window-y="0"
      inkscape:window-maximized="1"
      inkscape:snap-text-baseline="false"
      inkscape:snap-global="true"
@@ -772,45 +908,45 @@
        visible="true"
        empspacing="2"
        snapvisiblegridlinesonly="false"
-       originx="0"
-       originy="0" />
+       originx="0.1324995"
+       originy="0.13249953" />
     <sodipodi:guide
-       position="0,110"
+       position="0.1324995,144.13252"
        orientation="0,816"
        id="guide2084"
        inkscape:locked="false" />
     <sodipodi:guide
-       position="215.9,110"
+       position="216.03251,144.13252"
        orientation="1056,0"
        id="guide2086"
        inkscape:locked="false" />
     <sodipodi:guide
-       position="215.9,-169.4"
+       position="216.03251,-135.26752"
        orientation="0,-816"
        id="guide2088"
        inkscape:locked="false" />
     <sodipodi:guide
-       position="0,-169.4"
+       position="0.1324995,-135.26752"
        orientation="-1056,0"
        id="guide2090"
        inkscape:locked="false" />
     <sodipodi:guide
-       position="0,110"
+       position="0.1324995,144.13252"
        orientation="0,816"
        id="guide2092"
        inkscape:locked="false" />
     <sodipodi:guide
-       position="215.9,110"
+       position="216.03251,144.13252"
        orientation="1056,0"
        id="guide2094"
        inkscape:locked="false" />
     <sodipodi:guide
-       position="215.9,-169.4"
+       position="216.03251,-135.26752"
        orientation="0,-816"
        id="guide2096"
        inkscape:locked="false" />
     <sodipodi:guide
-       position="0,-169.4"
+       position="0.1324995,-135.26752"
        orientation="-1056,0"
        id="guide2098"
        inkscape:locked="false" />
@@ -831,21 +967,24 @@
      id="layer5"
      inkscape:label="bottom"
      style="display:inline;fill:#ffffff;stroke:#000000;stroke-opacity:1"
+     transform="translate(0.1324995,0.13249953)"
      sodipodi:insensitive="true">
     <rect
        style="fill:#ffffff;stroke:#000000;stroke-width:0.264999;stroke-opacity:1"
        id="rect4406"
-       width="140.40001"
-       height="109.8"
-       x="-0.42635968"
-       y="-0.023509653" />
+       width="140.39999"
+       height="144"
+       x="0"
+       y="-2.7815501e-08"
+       sodipodi:insensitive="true" />
   </g>
   <g
      inkscape:groupmode="layer"
      id="layer2"
      inkscape:label="Bits for making markers"
      style="display:none"
-     sodipodi:insensitive="true">
+     sodipodi:insensitive="true"
+     transform="translate(0.1324995,0.13249953)">
     <g
        id="g1180"
        transform="matrix(0.49669467,0,0,0.50055446,31.951354,59.212097)"
@@ -1323,7 +1462,8 @@
      inkscape:groupmode="layer"
      id="layer4"
      inkscape:label="Prevent marker &quot;cleanup&quot;"
-     style="display:none">
+     style="display:none"
+     transform="translate(0.1324995,0.13249953)">
     <path
        style="display:inline;fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.175;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-start:url(#marker8348-5)"
        d="m 173.40231,118.8 h 18"
@@ -1356,23 +1496,25 @@
   <text
      xml:space="preserve"
      id="text2056"
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+     style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82222px;line-height:125%;font-family:Sans;-inkscape-font-specification:'Sans, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;white-space:pre;shape-inside:url(#rect2058);display:none;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+     transform="translate(0.1324995,0.13249953)" />
   <text
      xml:space="preserve"
-     style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82223px;line-height:125%;font-family:Sans;-inkscape-font-specification:'Sans, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
-     x="80"
-     y="77.400002"
+     style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82223px;line-height:125%;font-family:Sans;-inkscape-font-specification:'Sans, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;display:none;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+     x="80.1325"
+     y="77.532501"
      id="text2156"><tspan
        sodipodi:role="line"
        id="tspan2154"
-       x="80"
-       y="77.400002"
+       x="0.1324995"
+       y="0.13249953"
        style="stroke-width:0.264583px" /></text>
   <g
      inkscape:groupmode="layer"
      id="layer3"
      inkscape:label="Examples"
-     style="display:inline">
+     style="display:inline"
+     transform="translate(0.1324995,0.13249953)">
     <g
        id="g1296"
        transform="matrix(1.1568693,0,0,0.99905934,-21.275811,-30.733858)">
@@ -1525,24 +1667,25 @@
        inkscape:connector-avoid="true" />
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        style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.529167;stroke-linecap:butt;stroke-linejoin:miter;stroke-dasharray:none;stroke-opacity:1"
-       d="m 39.74082,77.07744 57.5554,-0.208785 -0.19197,27.178005 -57.64507,-0.14328 z"
-       id="path384" />
+       d="m 39.74082,108.29834 57.5554,-0.20879 -0.19197,31.94064 -57.64507,-0.14328 z"
+       id="path384"
+       sodipodi:nodetypes="ccccc" />
     <path
        style="display:inline;fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.587612;stroke-linecap:butt;stroke-linejoin:miter;stroke-dasharray:none;stroke-opacity:1"
-       d="M 12.611141,7.2 H 125.98886 V 73.8 H 12.611141 Z"
+       d="M 12.611141,7.2 H 125.98886 v 97.29167 H 12.611141 Z"
        id="path384-9"
        sodipodi:nodetypes="ccccc" />
     <text
        xml:space="preserve"
        style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82223px;line-height:125%;font-family:Sans;-inkscape-font-specification:'Sans, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
        x="54.14555"
-       y="80.919235"
+       y="112.14011"
        id="text494"><tspan
          sodipodi:role="line"
          id="tspan492"
          style="stroke-width:0.264583px"
          x="54.14555"
-         y="80.919235">Relationship Key</tspan></text>
+         y="112.14011">Relationship Key</tspan></text>
     <text
        xml:space="preserve"
        style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82223px;line-height:125%;font-family:Sans;-inkscape-font-specification:'Sans, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.265;stroke-linecap:butt;stroke-linejoin:miter;stroke-dasharray:none;stroke-opacity:1"
@@ -1556,24 +1699,29 @@
          y="13.169698">Visual Key</tspan></text>
     <path
        style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.529167;stroke-linecap:butt;stroke-linejoin:miter;stroke-dasharray:none;stroke-opacity:1"
-       d="M 39.6,82.375002 H 97.2"
+       d="M 39.6,113.4 H 97.2"
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     <path
        style="display:inline;fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
-       d="M 39.6,87.775002 H 97.2"
+       d="M 39.6,118.8 H 97.2"
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     <path
        style="display:inline;fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
-       d="M 39.6,93.175002 H 97.2"
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-       d="M 39.6,98.575002 H 97.2"
+       d="M 39.6,129.6 H 97.2"
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+    <path
+       style="display:inline;fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       d="M 39.70833,135.21249 H 97.308318"
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     <path
        style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:0.529167;stroke-linecap:butt;stroke-linejoin:miter;stroke-dasharray:none;stroke-opacity:1"
-       d="M 73.8,82.375002 V 103.97502"
-       id="path552" />
+       d="m 73.8,113.4 v 26.36252"
+       id="path552"
+       sodipodi:nodetypes="cc" />
     <path
        style="fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:#000000;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-start:url(#Arrow2)"
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@@ -1663,10 +1811,47 @@
          x="44.374413"
          y="72.816536"
          id="tspan32257">are coded</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:2.82223px;line-height:125%;font-family:Sans;-inkscape-font-specification:'Sans, Normal';font-variant-ligatures:normal;font-variant-caps:normal;font-variant-numeric:normal;font-feature-settings:normal;text-align:start;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:start;display:inline;fill:#000000;fill-opacity:1;stroke:none;stroke-width:0.264583px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       x="70.628586"
+       y="91.947083"
+       id="text28201-0-6-9-2"><tspan
+         sodipodi:role="line"
+         style="stroke-width:0.264583px"
+         x="70.628586"
+         y="91.947083"
+         id="tspan32257-9">Tables/columns given alternate</tspan><tspan
+         sodipodi:role="line"
+         style="stroke-width:0.264583px"
+         x="70.628586"
+         y="95.474869"
+         id="tspan21751">names within a query or view</tspan></text>
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2.34.1