[libxml2]Add libxml2 library

2026-07-26 16:57:28 +08:00
parent 0a44ec8a06
commit e841ac915d
3790 changed files with 668244 additions and 0 deletions
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+<?xml version="1.0" standalone="yes"?>
+<svg xmlns="http://www.w3.org/Graphics/SVG/svg-19990412.dtd" width="4in" height="3in">
+  <desc>This example uses the switch element to provide a 
+  fallback graphical representation of an equation, if 
+  MathML is not supported.
+  </desc>
+  <!-- The <switch> element will process the first child element
+       whose testing attributes evaluate to true.-->
+  <switch>
+
+    <!-- Process the MathML if the system-required attribute
+         evaluates to true (i.e., the user agent supports MathML
+         embedded within SVG). -->
+    <foreignobject system-required="http://www.w3.org/TR/REC-MathML-19980407" width="100" height="50">
+      <!-- MathML content goes here -->
+    </foreignobject>
+
+    <!-- Else, process the following alternate SVG.
+         Note that there are no testing attributes on the <g> element.
+         If no testing attributes are provided, it is as if there
+         were testing attributes and they evaluated to true.-->
+    <g>
+      <!-- Draw a red rectangle with a text string on top. -->
+      <rect style="fill: red"/>
+      <text>Formula goes here</text>
+    </g>
+
+  </switch>
+</svg>