diff --git a/Doc/Sd1/errorHandling.xml b/Doc/Sd1/errorHandling.xml
index 35f5026e2765325c1e006e83345609a777cd494f..c74c66f6bdb844d815d39149fde147a3609a880d 100644
--- a/Doc/Sd1/errorHandling.xml
+++ b/Doc/Sd1/errorHandling.xml
@@ -67,7 +67,8 @@ System.out.println(s.length());</programlisting>
 
     <programlisting language="java">...
 if (somethingBadHappens) {
-  throw new NullPointerException();
+  throw new <link
+        xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/NullPointerException.html#%3Cinit%3E()">NullPointerException()</link>;
 }
 ...</programlisting>
 
@@ -83,7 +84,8 @@ if (somethingBadHappens) {
     <programlisting language="java">final String s = null;
 try {
   System.out.println(s.length()) ;
-} catch (final NullPointerException e) {
+} catch (final <link
+        xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/NullPointerException.html">NullPointerException</link> e) {
   System.out.println("Dear user, something bad just happened");
 }
 System.out.println("Business as usual ...");</programlisting>
@@ -147,7 +149,8 @@ System.out.println("Business as usual ...");</programlisting>
           relationship we are being left with the runtimes default terminating
           behaviour:</para>
 
-          <screen>Exception in thread "main" java.lang.NullPointerException
+          <screen>Exception in thread "main" <link
+              xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/NullPointerException.html">java.lang.NullPointerException</link>
   at exceptionhandling.NpeMsg.main(NpeMsg.java:8)</screen>
         </answer>
       </qandaentry>
@@ -187,7 +190,8 @@ System.out.println("Business as usual ...");</programlisting>
     destPath = Paths.get("/tmp/copy.java");
 
   // Compile time error:
-  // <emphasis role="red">Unhandled exception:
+  // <emphasis role="red"
+                xlink:href="https://docs.oracle.com/javase/10/docs/api/java/io/IOException.html">Unhandled exception:
       java.io.IOException</emphasis>
   Files.copy(sourcePath, destPath);
 ...</programlisting></td>
@@ -259,15 +263,19 @@ public void copyFile() throws IOException {
           <answer>
             <para>We catch the exception in question:</para>
 
-            <programlisting language="java">@Test(expected = FileAlreadyExistsException.class)
+            <programlisting language="java"><link
+                xlink:href="https://junit.org/junit4/javadoc/latest/org/junit/Test.html">@Test</link>(<link
+                xlink:href="https://junit.org/junit4/javadoc/latest/org/junit/Test.html#expected()">expected</link> = <link
+                xlink:href="https://docs.oracle.com/javase/10/docs/api/java/nio/file/FileAlreadyExistsException.html">FileAlreadyExistsException</link>.class)
 public void copyFile() throws IOException {
   final Path
     source = Paths.get("/tmp/source.txt"),
     dest   = Paths.get("/tmp/dest.txt");
   try {
-    Files.copy(source, dest);  // May work.
-    Files.copy(source, dest);  // Failure: FileAlreadyExistsException
-  } catch (final FileAlreadyExistsException e) {
+    <link xlink:href="https://docs.oracle.com/javase/10/docs/api/java/nio/file/Files.html#copy(java.nio.file.Path,java.nio.file.Path,java.nio.file.CopyOption...)">Files.copy(source, dest)</link>;  // May work.
+    <link xlink:href="https://docs.oracle.com/javase/10/docs/api/java/nio/file/Files.html#copy(java.nio.file.Path,java.nio.file.Path,java.nio.file.CopyOption...)">Files.copy(source, dest)</link>;  // Failure: FileAlreadyExistsException
+  } catch (final <link
+                xlink:href="https://docs.oracle.com/javase/10/docs/api/java/nio/file/FileAlreadyExistsException.html">FileAlreadyExistsException</link> e) {
     System.out.println("Destination file already exists");
   }
 }</programlisting>
@@ -280,7 +288,8 @@ public void copyFile() throws IOException {
 
             <screen>Destination file already exists
 
-java.lang.AssertionError: Expected exception: java.nio.file.FileAlreadyExistsException</screen>
+java.lang.AssertionError: Expected exception: <link
+                xlink:href="https://docs.oracle.com/javase/10/docs/api/java/nio/file/FileAlreadyExistsException.html">java.nio.file.FileAlreadyExistsException</link></screen>
           </answer>
         </qandaentry>
       </qandadiv>
@@ -291,10 +300,11 @@ java.lang.AssertionError: Expected exception: java.nio.file.FileAlreadyExistsExc
     <title>Variants</title>
 
     <figure xml:id="sd1_errorHandling_fig_justFinally_">
-      <title>Just <code language="java">finally</code></title>
+      <title>Just <code language="java">finally</code>, no <code
+      language="java">catch</code></title>
 
       <programlisting language="java"><link
-          xlink:href="https://docs.oracle.com/javase/10/docs/api/java/util/Scanner.html">Scanner</link> scanner = null;
+          xlink:href="https://docs.oracle.com/javase/10/docs/api/java/util/Scanner.html"> Scanner</link> scanner = null;
 try {
   scanner = new <link
           xlink:href="https://docs.oracle.com/javase/10/docs/api/java/io/InputStream.html">Scanner(</link>System.in);
@@ -371,7 +381,7 @@ public class StackTrace {
 }</programlisting></td>
 
           <td valign="top"><screen>Exception in thread "main"
-   java.lang.NullPointerException
+   <link xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/NullPointerException.html">java.lang.NullPointerException</link>
  at ex.Trace.c(Trace.java:10)
  at ex.Trace.b(Trace.java:7)
  at ex.Trace.a(Trace.java:6)
@@ -386,13 +396,17 @@ public class StackTrace {
       <informaltable border="0">
         <tr>
           <td valign="top"><programlisting language="java">try {
-  FileInputStream f = new FileInputStream(
-     new File("test.txt"));
-} catch(FileNotFoundException e) {
+  <link xlink:href="https://docs.oracle.com/javase/10/docs/api/java/io/FileInputStream.html">FileInputStream</link> f = new <link
+                xlink:href="https://docs.oracle.com/javase/10/docs/api/java/io/FileInputStream.html#%3Cinit%3E(java.io.File)">FileInputStream(
+     new File("test.txt"))</link>;
+} catch(final <link
+                xlink:href="https://docs.oracle.com/javase/10/docs/api/java/io/FileNotFoundException.html">FileNotFoundException</link> e) {
   System.err.println( "File not found");
-} catch (IOException e) {
+} catch (final <link
+                xlink:href="https://docs.oracle.com/javase/10/docs/api/java/io/IOException.html">IOException</link> e) {
   System.err.println( "IO error");
-} catch(Exception e) {
+} catch(final <link
+                xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/Exception.html">Exception</link> e) {
   System.err.println("General error");
 }</programlisting></td>
 
@@ -411,13 +425,16 @@ public class StackTrace {
       <informaltable border="0">
         <tr>
           <td valign="top"><programlisting language="none">try {
-  FileInputStream f = new FileInputStream(
-     new File("test.txt"));
+  FileInputStream f = new <link
+                xlink:href="https://docs.oracle.com/javase/10/docs/api/java/io/FileInputStream.html">FileInputStream</link>(
+     new <link xlink:href="https://docs.oracle.com/javase/10/docs/api/java/io/File.html#%3Cinit%3E(java.lang.String)">File("test.txt"))</link>;
 } catch(Exception e) {
       System.err.println("General error");
-} catch (<emphasis role="red">IOException e</emphasis>) {
+} catch (<emphasis role="red"
+                xlink:href="https://docs.oracle.com/javase/10/docs/api/java/io/IOException.html">IOException e</emphasis>) {
       System.err.println( "IO error");
-} catch(<emphasis role="red">FileNotFoundException e</emphasis>) {
+} catch(<emphasis role="red"
+                xlink:href="https://docs.oracle.com/javase/10/docs/api/java/io/FileNotFoundException.html">FileNotFoundException e</emphasis>) {
       System.err.println("File not found");
 }</programlisting></td>
 
@@ -500,10 +517,11 @@ static public String convert(final String input) {
       <title>Step 2: Derive <classname>CardinalException</classname></title>
 
       <programlisting language="java">public class CardinalException
-  extends IllegalArgumentException {
+  extends <link
+          xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/IllegalArgumentException.html">IllegalArgumentException</link> {
 
   public CardinalException(final String msg) {
-    super(msg);
+    <link xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/IllegalArgumentException.html#%3Cinit%3E(java.lang.String)">super(msg)</link>;
   }
 }</programlisting>
     </figure>
@@ -518,7 +536,7 @@ static public String convert(final String input) {
    * @throws CardinalException If input not from list.
    */
   static public String convert(final String input)
-    throws CardinalException{
+    throws CardinalException {
 
     switch (input) {
       case "one": return "first";
@@ -534,11 +552,14 @@ static public String convert(final String input) {
       <title>Step 4: Unit test throwing
       <classname>CardinalException</classname></title>
 
-      <programlisting language="java">@Test public void testRegular() {
-  Assert.assertEquals("second", Cardinal.convert("two"));
+      <programlisting language="java"><link
+          xlink:href="https://junit.org/junit4/javadoc/latest/org/junit/Test.html">@Test</link> public void testRegular() {
+  Assert.<link
+          xlink:href="https://junit.org/junit4/javadoc/latest/org/junit/Assert.html#assertEquals(java.lang.Object,%20java.lang.Object)">assertEquals("second", Cardinal.convert("two")</link>);
 }
 
-@Test(expected = CardinalException.class)
+<link xlink:href="https://junit.org/junit4/javadoc/latest/org/junit/Test.html">@Test</link>(<link
+          xlink:href="https://junit.org/junit4/javadoc/latest/org/junit/Test.html#expected()">expected</link> = CardinalException.class)
 public void testException() {
   Assert.assertEquals("X", Cardinal.convert("four"));
 }</programlisting>
diff --git a/Doc/Sd1/inheritance.xml b/Doc/Sd1/inheritance.xml
index caa241fd60e4df3170e147afdf20c75d0b1fdd5c..afb72dc687b95804943a461bb6acc3b357fed919 100644
--- a/Doc/Sd1/inheritance.xml
+++ b/Doc/Sd1/inheritance.xml
@@ -1356,7 +1356,7 @@ System.out.println(c.equals(c));   // true: Object equal to itself.</programlist
 
     <figure xml:id="sd1_inherit_fig_rectangleEquals">
       <title>Implementing <classname>Rectangle</classname>.<methodname
-      xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/Object.html#equals-java.lang.Object-">equals()</methodname></title>
+      xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/Object.html#equals-java.lang.Object)">equals()</methodname></title>
 
       <programlisting language="java">public class Rectangle extends Shape {
     @Override public boolean equals(Object o) {
@@ -1379,7 +1379,7 @@ System.out.println(c.equals(c));   // true: Object equal to itself.</programlist
 
     <figure xml:id="sd1_inherit_fig_circleEquals">
       <title>Implementing <classname>Circle</classname>.<methodname
-      xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/Object.html#equals-java.lang.Object-">equals()</methodname></title>
+      xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/Object.html#equals-java.lang.Object)">equals()</methodname></title>
 
       <programlisting language="java">public class Circle extends Shape {
   @Override public boolean equals(final Object o) {
diff --git a/Doc/Sd1/workingWithNumbers.xml b/Doc/Sd1/workingWithNumbers.xml
index b75024d005e81ddc4eb9c17816636933ff1dc4ab..2f04d2df9dc91f7bd419f0002d89562e99bccf80 100644
--- a/Doc/Sd1/workingWithNumbers.xml
+++ b/Doc/Sd1/workingWithNumbers.xml
@@ -54,7 +54,7 @@ while (!values.empty()) {
           <itemizedlist>
             <listitem>
               <para><methodname
-              xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/Object.html#equals-java.lang.Object-">public
+              xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/Object.html#equals-java.lang.Object)">public
               boolean equals</methodname>(<classname
               xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/Object.html">Object</classname>
               obj)</para>
@@ -62,7 +62,7 @@ while (!values.empty()) {
 
             <listitem>
               <para><methodname
-              xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/Object.html#hashCode--">public
+              xlink:href="https://docs.oracle.com/javase/10/docs/api/java/lang/Object.html#hashCode()">public
               int hashCode()</methodname></para>
             </listitem>
           </itemizedlist>