.

graph/Show.drawio.svg

@@ -1,56 +1,56 @@
-<svg host="65bd71144e" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="151px" height="331px" viewBox="-0.5 -0.5 151 331" content="&lt;mxfile&gt;&lt;diagram id=&quot;foU8mDb0TlC7YyvVAcvL&quot; name=&quot;第 1 页&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;">
+<svg host="65bd71144e" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="121px" height="331px" viewBox="-0.5 -0.5 121 331" content="&lt;mxfile&gt;&lt;diagram id=&quot;foU8mDb0TlC7YyvVAcvL&quot; name=&quot;第 1 页&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;">
     <defs/>
     <g>
-        <path d="M 100 0 L 150 40 L 100 80 L 50 40 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 60 140 L 60 80" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <rect x="0" y="140" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
         <g transform="translate(-0.5 -0.5)">
             <switch>
                 <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 98px; height: 1px; padding-top: 40px; margin-left: 51px;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 170px; margin-left: 1px;">
                         <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                             <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
-                                图表模块
+                                打印一个图表格式
                             </div>
                         </div>
                     </div>
                 </foreignObject>
-                <text x="100" y="44" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                <text x="60" y="174" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    图表模块
+                    打印一个图表格式
                 </text>
             </switch>
         </g>
-        <path d="M 70 140 L 100 80" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 60 270 L 60 200" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
-        <rect x="20" y="140" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <rect x="0" y="270" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
         <g transform="translate(-0.5 -0.5)">
             <switch>
                 <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 170px; margin-left: 21px;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 300px; margin-left: 1px;">
                         <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                             <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
-                                打印一个图表格式
+                                调用打印函数
                             </div>
                         </div>
                     </div>
                 </foreignObject>
-                <text x="80" y="174" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                <text x="60" y="304" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    打印一个图表格式
+                    调用打印函数
                 </text>
             </switch>
         </g>
-        <path d="M 50 270 L 80 200" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <ellipse cx="60" cy="40" rx="60" ry="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
-        <rect x="0" y="270" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
         <g transform="translate(-0.5 -0.5)">
             <switch>
                 <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 300px; margin-left: 1px;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 40px; margin-left: 1px;">
                         <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                             <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
-                                调用打印函数
+                                图表模块
                             </div>
                         </div>
                     </div>
                 </foreignObject>
-                <text x="60" y="304" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                <text x="60" y="44" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    调用打印函数
+                    图表模块
                 </text>
             </switch>
         </g>
@@ -59,7 +59,7 @@
         <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
         <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
             <text text-anchor="middle" font-size="10px" x="50%" y="100%">
-                Viewer does not support full SVG 1.1
+                Text is not SVG - cannot display
             </text>
         </a>
     </switch>

graph/delete_from_list.drawio.svg

@@ -0,0 +1,103 @@
+<svg host="65bd71144e" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="301px" height="476px" viewBox="-0.5 -0.5 301 476" content="&lt;mxfile&gt;&lt;diagram id=&quot;-XFupFh_2-8t2MVtY42_&quot; name=&quot;第 1 页&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;">
+    <defs/>
+    <g>
+        <path d="M 130 0 L 220 40 L 130 80 L 40 40 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 178px; height: 1px; padding-top: 40px; margin-left: 41px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                删除模块
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="130" y="44" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    删除模块
+                </text>
+            </switch>
+        </g>
+        <path d="M 130 160 L 130 80" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 130 160 L 185 200 L 130 240 L 75 200 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 108px; height: 1px; padding-top: 200px; margin-left: 76px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                判断链表并返回信息
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="130" y="204" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    判断链表并返回信息
+                </text>
+            </switch>
+        </g>
+        <path d="M 129.96 310.02 L 130 240" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <rect x="75" y="300" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 330px; margin-left: 76px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                定义数组进行id比对
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="135" y="334" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    定义数组进行id比对
+                </text>
+            </switch>
+        </g>
+        <path d="M 60 420 L 135 360" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 169.5 360 L 242.45 423.44 Q 250 430 253.23 425.15 L 256.47 420.3" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 259.38 415.93 L 258.41 423.7 L 256.47 420.3 L 252.58 419.81 Z" fill="rgb(0, 0, 0)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <rect x="0" y="415" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 445px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                不存在则返回错误信息
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="449" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    不存在则返回错误信息
+                </text>
+            </switch>
+        </g>
+        <rect x="180" y="415" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 445px; margin-left: 181px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                存在则释放对应结点并更新结点
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="240" y="449" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    存在则释放对应结点并更新结点
+                </text>
+            </switch>
+        </g>
+    </g>
+    <switch>
+        <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
+        <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
+            <text text-anchor="middle" font-size="10px" x="50%" y="100%">
+                Text is not SVG - cannot display
+            </text>
+        </a>
+    </switch>
+</svg>

graph/exit.drawio.svg

@@ -0,0 +1,48 @@
+<svg host="65bd71144e" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="141px" height="241px" viewBox="-0.5 -0.5 141 241" content="&lt;mxfile&gt;&lt;diagram id=&quot;fPKIzau6LSH738rFNKAg&quot; name=&quot;第 1 页&quot;&gt;tVTBjqMwDP0a3xtCKRyhpTOXkUbqYc9Z4gUkIFUaCt2v36SEQoCRelmpqpIXx7Hfewbose4/JLsWX4JjBd6O90BP4HkhCfS/AR4D4Hv+AOSy5ANEJuBS/kUL7izalhxvTqASolLl1QUz0TSYKQdjUorODfsjKvfVK8txBVwyVq3RXyVXhW3LO0z4J5Z5Mb5Mgmg4qdkYbDu5FYyLbgbRFOhRCqGGVd0fsTLcjbwM984/nL4Kk9iody54w4U7q1rbG6QRhDvzS/cQHiCJIQ0gDiEmBolOENk2b+oxEiILUf9uNatJV5QKL1eWmZNOq6+xQtWV3hG9XNdnS76jVNjPIFvvB4oalXzokN41gfUOCe2+m5QgvsWKmQpjHLPi56/MEz96YSnapouu6VpSgQ2PjcX0rhENvtm+YjJH5WiC3DHhmo9Zw/uNfkdMYsVUeXetu0WCfeFblLq4F92hSzcNFjTeRCsztJfmTlvkIXSRiCwSDRSsEj0leXX9lkr+hqlDSLSpKaQHiHxj59SH5GzsrE0da1OHo99Pxu/R3sRrJIkgCQwSRhDRZ8zpebSekmdCMyU6mEB8Xk+JaBuO3Hrh/0+K94N080nxNpyzlPiNSdHb6aM1SDZ9+Wn6Dw==&lt;/diagram&gt;&lt;/mxfile&gt;">
+    <defs/>
+    <g>
+        <path d="M 70 0 L 140 40 L 70 80 L 0 40 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 138px; height: 1px; padding-top: 40px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                退出模块
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="70" y="44" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    退出模块
+                </text>
+            </switch>
+        </g>
+        <path d="M 70 180 L 70 80" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <rect x="10" y="180" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 210px; margin-left: 11px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                调用保存函数并打印退出信息
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="70" y="214" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    调用保存函数并打印退出信息
+                </text>
+            </switch>
+        </g>
+    </g>
+    <switch>
+        <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
+        <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
+            <text text-anchor="middle" font-size="10px" x="50%" y="100%">
+                Text is not SVG - cannot display
+            </text>
+        </a>
+    </switch>
+</svg>

graph/find_goods.drawio.svg

@@ -0,0 +1,102 @@
+<svg host="65bd71144e" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="301px" height="476px" viewBox="-0.5 -0.5 301 476" content="&lt;mxfile&gt;&lt;diagram id=&quot;2D1wWDd2h5TJuRrKpX-K&quot; name=&quot;第 1 页&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;">
+    <defs/>
+    <g>
+        <path d="M 140 0 L 225 40 L 140 80 L 55 40 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 168px; height: 1px; padding-top: 40px; margin-left: 56px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                查找模块
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="140" y="44" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    查找模块
+                </text>
+            </switch>
+        </g>
+        <path d="M 140 160 L 140 80" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <rect x="80" y="160" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 190px; margin-left: 81px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                判断链表是否存在并返回信息
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="140" y="194" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    判断链表是否存在并返回信息
+                </text>
+            </switch>
+        </g>
+        <path d="M 139.96 300 L 140 220" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <rect x="70" y="300" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 330px; margin-left: 71px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                创建数组进行id比对
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="130" y="334" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    创建数组进行id比对
+                </text>
+            </switch>
+        </g>
+        <path d="M 90 420 L 60 420 Q 50 420 58 414 L 130 360" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 200 420 L 230 420 Q 240 420 231.37 414.95 L 139.72 361.32" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <rect x="0" y="415" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 445px; margin-left: 1px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                若不存在则返回错误信息
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="60" y="449" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    若不存在则返回错误信息
+                </text>
+            </switch>
+        </g>
+        <rect x="180" y="415" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <g transform="translate(-0.5 -0.5)">
+            <switch>
+                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 445px; margin-left: 181px;">
+                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
+                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
+                                存在则链表返回物品信息
+                            </div>
+                        </div>
+                    </div>
+                </foreignObject>
+                <text x="240" y="449" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                    存在则链表返回物品信息
+                </text>
+            </switch>
+        </g>
+    </g>
+    <switch>
+        <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
+        <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
+            <text text-anchor="middle" font-size="10px" x="50%" y="100%">
+                Text is not SVG - cannot display
+            </text>
+        </a>
+    </switch>
+</svg>

graph/show_goods.drawio.svg

@@ -1,101 +1,85 @@
-<svg host="65bd71144e" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="271px" height="426px" viewBox="-0.5 -0.5 271 426" content="&lt;mxfile&gt;&lt;diagram id=&quot;Z0kfLe1TwEOepRIeOdqV&quot; name=&quot;第 1 页&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;">
+<svg host="65bd71144e" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="311px" height="471px" viewBox="-0.5 -0.5 311 471" content="&lt;mxfile&gt;&lt;diagram id=&quot;Z0kfLe1TwEOepRIeOdqV&quot; name=&quot;第 1 页&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;">
     <defs/>
     <g>
-        <path d="M 100 0 L 170 40 L 100 80 L 30 40 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 160 170 L 160 80" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
-        <g transform="translate(-0.5 -0.5)">
+        <path d="M 60 290 L 130 230" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
-            <switch>
+        <rect x="0" y="290" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
-                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 138px; height: 1px; padding-top: 40px; margin-left: 31px;">
-                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
-                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
-                                打印模块
-                            </div>
-                        </div>
-                    </div>
-                </foreignObject>
-                <text x="100" y="44" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    打印模块
-                </text>
-            </switch>
-        </g>
-        <path d="M 80 170 L 100 80" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
-        <rect x="20" y="170" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
         <g transform="translate(-0.5 -0.5)">
             <switch>
                 <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 200px; margin-left: 21px;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 320px; margin-left: 1px;">
                         <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                             <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
-                                判断头指针
+                                为空返回错误信息
                             </div>
                         </div>
                     </div>
                 </foreignObject>
-                <text x="80" y="204" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                <text x="60" y="324" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    判断头指针
+                    为空返回错误信息
                 </text>
             </switch>
         </g>
-        <path d="M 50 290 L 80 230" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 190 230 L 230 290" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
-        <rect x="0" y="290" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <rect x="190" y="290" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
         <g transform="translate(-0.5 -0.5)">
             <switch>
                 <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 320px; margin-left: 1px;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 320px; margin-left: 191px;">
                         <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                             <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
-                                为空返回错误信息
+                                不为空定义指针变量
                             </div>
                         </div>
                     </div>
                 </foreignObject>
-                <text x="60" y="324" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                <text x="250" y="324" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    为空返回错误信息
+                    不为空定义指针变量
                 </text>
             </switch>
         </g>
-        <path d="M 140 200 L 186.67 260" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 250 410 L 250 350" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
-        <rect x="150" y="260" width="120" height="60" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <rect x="190" y="410" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
         <g transform="translate(-0.5 -0.5)">
             <switch>
                 <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 290px; margin-left: 151px;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 440px; margin-left: 191px;">
                         <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                             <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
-                                不为空定义指针变量
+                                打印商品信息
                             </div>
                         </div>
                     </div>
                 </foreignObject>
-                <text x="210" y="294" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                <text x="250" y="444" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    不为空定义指针变量
+                    打印商品信息
                 </text>
             </switch>
         </g>
-        <path d="M 180 370 L 230 320" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 160 160 L 250 200 L 160 240 L 70 200 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
-        <rect x="140" y="365" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
         <g transform="translate(-0.5 -0.5)">
             <switch>
                 <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 395px; margin-left: 141px;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 178px; height: 1px; padding-top: 200px; margin-left: 71px;">
                         <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                             <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
-                                打印商品信息
+                                判断头指针
                             </div>
                         </div>
                     </div>
                 </foreignObject>
-                <text x="200" y="399" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                <text x="160" y="204" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    打印商品信息
+                    判断头指针
                 </text>
             </switch>
         </g>
+        <ellipse cx="160" cy="40" rx="60" ry="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
     </g>
     <switch>
         <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
         <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
             <text text-anchor="middle" font-size="10px" x="50%" y="100%">
-                Viewer does not support full SVG 1.1
+                Text is not SVG - cannot display
             </text>
         </a>
     </switch>

graph/sort.drawio.svg

@@ -1,56 +1,56 @@
-<svg host="65bd71144e" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="181px" height="331px" viewBox="-0.5 -0.5 181 331" content="&lt;mxfile&gt;&lt;diagram id=&quot;N5vIadnCPQ0VjbP5Tubx&quot; name=&quot;第 1 页&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;">
+<svg host="65bd71144e" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="121px" height="331px" viewBox="-0.5 -0.5 121 331" content="&lt;mxfile&gt;&lt;diagram id=&quot;N5vIadnCPQ0VjbP5Tubx&quot; name=&quot;第 1 页&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;">
     <defs/>
     <g>
-        <path d="M 110 0 L 180 40 L 110 80 L 40 40 Z" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="all"/>
+        <path d="M 60 140 L 60 80" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <rect x="0" y="140" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
         <g transform="translate(-0.5 -0.5)">
             <switch>
                 <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 138px; height: 1px; padding-top: 40px; margin-left: 41px;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 170px; margin-left: 1px;">
                         <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                             <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
-                                排序模块
+                                链表的冒泡排序
                             </div>
                         </div>
                     </div>
                 </foreignObject>
-                <text x="110" y="44" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                <text x="60" y="174" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    排序模块
+                    链表的冒泡排序
                 </text>
             </switch>
         </g>
-        <path d="M 80 140 L 110 80" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <path d="M 60 270 L 60 200" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
-        <rect x="10" y="140" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
+        <rect x="0" y="270" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
         <g transform="translate(-0.5 -0.5)">
             <switch>
                 <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 170px; margin-left: 11px;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 300px; margin-left: 1px;">
                         <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                             <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
-                                链表的冒泡排序
+                                定义前后指针对物品id进行从小到大的排序
                             </div>
                         </div>
                     </div>
                 </foreignObject>
-                <text x="70" y="174" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                <text x="60" y="304" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    链表的冒泡排序
+                    定义前后指针对物品id进行从小到大的排序
                 </text>
             </switch>
         </g>
-        <path d="M 60 270 L 70 200" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="stroke"/>
+        <ellipse cx="60" cy="40" rx="60" ry="40" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
-        <rect x="0" y="270" width="120" height="60" rx="9" ry="9" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="all"/>
         <g transform="translate(-0.5 -0.5)">
             <switch>
                 <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 300px; margin-left: 1px;">
+                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 118px; height: 1px; padding-top: 40px; margin-left: 1px;">
                         <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
                             <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: all; white-space: normal; overflow-wrap: normal;">
-                                定义前后指针对物品id进行从小到大的排序
+                                排序模块
                             </div>
                         </div>
                     </div>
                 </foreignObject>
-                <text x="60" y="304" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
+                <text x="60" y="44" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    定义前后指针对物品id进行从小到大的排序
+                    排序模块
                 </text>
             </switch>
         </g>
@@ -59,7 +59,7 @@
         <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
         <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
             <text text-anchor="middle" font-size="10px" x="50%" y="100%">
-                Viewer does not support full SVG 1.1
+                Text is not SVG - cannot display
             </text>
         </a>
     </switch>