diff --git a/src/de/unibremen/informatik/hets/model/Actuals.java b/src/de/unibremen/informatik/hets/model/Actuals.java
new file mode 100644
index 0000000..e0a04f1
--- /dev/null
+++ b/src/de/unibremen/informatik/hets/model/Actuals.java
@@ -0,0 +1,11 @@
+package de.unibremen.informatik.hets.model;
+
+public class Actuals extends Spec {
+    public Actuals(String cont, String anno) {
+        super(cont, anno);
+    }
+
+    public String toString() {
+        return content + "\n";
+    }
+}
diff --git a/src/de/unibremen/informatik/hets/model/Basicspec.java b/src/de/unibremen/informatik/hets/model/Basicspec.java
new file mode 100644
index 0000000..62e7033
--- /dev/null
+++ b/src/de/unibremen/informatik/hets/model/Basicspec.java
@@ -0,0 +1,7 @@
+package de.unibremen.informatik.hets.model;
+
+public class Basicspec extends Spec {
+    public Basicspec(String cont, String anno) {
+        super(cont, anno);
+    }
+}
diff --git a/src/de/unibremen/informatik/hets/model/HetFile.java b/src/de/unibremen/informatik/hets/model/HetFile.java
new file mode 100644
index 0000000..ead64ab
--- /dev/null
+++ b/src/de/unibremen/informatik/hets/model/HetFile.java
@@ -0,0 +1,42 @@
+package de.unibremen.informatik.hets.model;
+
+import java.util.ArrayList;
+
+public class HetFile {
+    private String libname;
+    private ArrayList<SpecDefn> specdefns;
+
+    public HetFile(String name) {
+        libname = name;
+        specdefns = new ArrayList<SpecDefn>();
+    }
+
+    public void add(SpecDefn specdefn) {
+        specdefns.add(specdefn);
+    }
+
+    public String toString() {
+        StringBuilder builder = new StringBuilder();
+
+        builder.append("library ");
+        builder.append(libname);
+        builder.append("\n\n");
+
+        String logic = "";
+
+        for (SpecDefn specdefn : specdefns) {
+            if (logic != specdefn.getLogic()) {
+                logic = specdefn.getLogic();
+
+                builder.append("logic ");
+                builder.append(logic);
+                builder.append("\n\n");
+            }
+
+            builder.append(specdefn.toString());
+            builder.append("\n");
+        }
+
+        return builder.toString();
+    }
+}
diff --git a/src/de/unibremen/informatik/hets/model/PPXMLParser.java b/src/de/unibremen/informatik/hets/model/PPXMLParser.java
new file mode 100644
index 0000000..abb7be6
--- /dev/null
+++ b/src/de/unibremen/informatik/hets/model/PPXMLParser.java
@@ -0,0 +1,156 @@
+package de.unibremen.informatik.hets.model;
+
+import java.util.ArrayList;
+import java.io.InputStream;
+import java.io.IOException;
+
+import de.unibremen.informatik.hets.model.HetFile;
+import de.unibremen.informatik.hets.model.PPXMLParserException;
+import de.unibremen.informatik.hets.common.xml.Dom;
+import de.unibremen.informatik.hets.common.lang.StringUtils;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+import org.xml.sax.SAXException;
+
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+
+public class PPXMLParser {
+    static {
+    }
+
+    public PPXMLParser() {
+        super();
+    }
+
+    private static String getrange(String hetfile, String range) throws PPXMLParserException {
+        int minus = range.indexOf('-');
+        int fromdot, todot;
+        int fromline, fromcolumn;
+        int toline, tocolumn;
+
+        String from, to;
+
+        try {
+            from = range.substring(0, minus);
+            to = range.substring(minus+1);
+        } catch (IndexOutOfBoundsException e) {
+            throw new PPXMLParserException(e);
+        }
+
+        fromdot = from.indexOf('.');
+        todot = to.indexOf('.');
+
+        if (fromdot == -1 || todot == -1) {
+            throw new PPXMLParserException();
+        }
+
+        try {
+            fromline = Integer.parseInt(from.substring(0, fromdot));
+            fromcolumn = Integer.parseInt(from.substring(fromdot+1));
+
+            toline = Integer.parseInt(to.substring(0, todot));
+            tocolumn = Integer.parseInt(to.substring(todot+1));
+        } catch (NumberFormatException e) {
+            throw new PPXMLParserException(e);
+        } catch (IndexOutOfBoundsException e) {
+            throw new PPXMLParserException(e);
+        }
+
+        try {
+            return StringUtils.getSlice(hetfile, fromline, fromcolumn, toline, tocolumn);
+        } catch (java.io.IOException e) {
+            throw new PPXMLParserException(e);
+        }
+    }
+
+    private static Spec parsespec(String hetfile, Element spec) throws PPXMLParserException {
+        spec = Dom.getFirstChildElement(spec);
+
+        if (spec == null) {
+            throw new PPXMLParserException("<spec> block doesnt have a child");
+        }
+
+        if (spec.getTagName() == "Union") {
+            Union un = new Union();
+            ArrayList<Element> speclist = Dom.getChildElements(spec);
+
+            for (Element s : speclist) {
+                un.add(parsespec(hetfile, s));
+            }
+            return un;
+        } else {
+            return parsespecspec(hetfile, spec);
+        }
+    }
+
+    private static Spec parsespecspec(String hetfile, Element spec) throws PPXMLParserException {
+        Element left = Dom.getFirstChildElement(spec);
+
+        String annotation = "";
+
+        if (left != null && left.getTagName() == "Left") {
+            annotation = Dom.getTextContent(Dom.getFirstChildElement(left));
+        }
+
+        if (spec.getTagName() == "Basicspec") {
+            return new Basicspec(getrange(hetfile, spec.getAttribute("range")), annotation);
+        } else if (spec.getTagName() == "Actuals") {
+            return new Actuals(spec.getAttribute("name"), annotation);
+        } else {
+            throw new PPXMLParserException();
+        }
+    }
+
+    public static HetFile parse(InputStream ppxml, String hetfile) throws PPXMLParserException {
+        Document document;
+
+        try {
+            document = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(ppxml);
+        } catch (ParserConfigurationException e) {
+            throw new PPXMLParserException(e);
+        } catch (org.xml.sax.SAXException e) {
+            throw new PPXMLParserException(e);
+        } catch (IOException e) {
+            throw new PPXMLParserException(e);
+        }
+
+        Node root = document.getDocumentElement();
+
+        HetFile het = new HetFile(((Element)root).getAttribute("name"));
+
+        ArrayList<Element> list = Dom.getChildElements(root);
+
+        String currentlogic = "";
+
+        for (Element item : list) {
+            if (item.getNodeName() == "Logic") {
+                currentlogic = ((Element)item).getAttribute("name");
+            } else if (item.getNodeName() == "SpecDefn") {
+                if (currentlogic == "") {
+                    throw new PPXMLParserException();
+                }
+
+                SpecDefn specdefn = new SpecDefn(((Element)item).getAttribute("name"), currentlogic);
+
+                Element child = Dom.getFirstChildElement(item);
+
+                if (child.getTagName() == "Basicspec") {
+                    specdefn.add(parsespecspec(hetfile, child));
+                } else if (child.getTagName() == "Extension") {
+                    ArrayList<Element> speclist = Dom.getChildElements(child);
+
+                    for (Element spec : speclist) {
+                        specdefn.add(parsespec(hetfile, spec));
+                    }
+                }
+
+                het.add(specdefn);
+            }
+        }
+
+        return het;
+    }
+}
diff --git a/src/de/unibremen/informatik/hets/model/PPXMLParserException.java b/src/de/unibremen/informatik/hets/model/PPXMLParserException.java
new file mode 100644
index 0000000..b4f15bc
--- /dev/null
+++ b/src/de/unibremen/informatik/hets/model/PPXMLParserException.java
@@ -0,0 +1,15 @@
+package de.unibremen.informatik.hets.model;
+
+public class PPXMLParserException extends Exception {
+    public PPXMLParserException(Throwable cause) {
+        super(cause);
+    }
+
+    public PPXMLParserException() {
+        super();
+    }
+
+    public PPXMLParserException(String message) {
+        super(message);
+    }
+}
diff --git a/src/de/unibremen/informatik/hets/model/Spec.java b/src/de/unibremen/informatik/hets/model/Spec.java
new file mode 100644
index 0000000..173b0af
--- /dev/null
+++ b/src/de/unibremen/informatik/hets/model/Spec.java
@@ -0,0 +1,29 @@
+package de.unibremen.informatik.hets.model;
+
+public class Spec {
+    protected String annotation;
+    protected String content;
+
+    public Spec(String cont, String anno) {
+        content = cont;
+        annotation = anno;
+    }
+
+    public Spec(String cont) {
+        content = cont;
+        annotation = null;
+    }
+
+    public Spec() {
+        content = null;
+        annotation = null;
+    }
+
+    public String toString() {
+        return content;
+    }
+
+    public String getAnnotation() {
+        return annotation;
+    }
+}
diff --git a/src/de/unibremen/informatik/hets/model/SpecDefn.java b/src/de/unibremen/informatik/hets/model/SpecDefn.java
new file mode 100644
index 0000000..675231f
--- /dev/null
+++ b/src/de/unibremen/informatik/hets/model/SpecDefn.java
@@ -0,0 +1,59 @@
+package de.unibremen.informatik.hets.model;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+
+public class SpecDefn {
+    private ArrayList<Spec> specs;
+    private String name;
+    private String logic;
+
+    public SpecDefn(String n, String l) {
+        name = n;
+        logic = l;
+        specs = new ArrayList<Spec>();
+    }
+
+    public void add(Spec spec) {
+        specs.add(spec);
+    }
+
+    public String getLogic() {
+        return logic;
+    }
+
+    public String toString() {
+        StringBuilder builder = new StringBuilder();
+
+        builder.append("spec ");
+        builder.append(name);
+        builder.append(" =");
+
+        Iterator<Spec> it = specs.iterator();
+        for (;;) {
+            Spec spec = it.next();
+            String annotation = spec.getAnnotation();
+
+            if (annotation != null) {
+                builder.append(" ");
+                builder.append(spec.getAnnotation());
+            }
+
+            if (!(spec instanceof Union)) {
+                builder.append("\n");
+            }
+            builder.append(spec.toString());
+
+            if (it.hasNext()) {
+                builder.append("then");
+            } else {
+                break;
+            }
+        }
+
+        builder.append("end");
+        builder.append("\n");
+
+        return builder.toString();
+    }
+}
diff --git a/src/de/unibremen/informatik/hets/model/Union.java b/src/de/unibremen/informatik/hets/model/Union.java
new file mode 100644
index 0000000..16d1565
--- /dev/null
+++ b/src/de/unibremen/informatik/hets/model/Union.java
@@ -0,0 +1,46 @@
+package de.unibremen.informatik.hets.model;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+
+public class Union extends Spec {
+    private ArrayList<Spec> specs;
+
+    public Union() {
+        specs = new ArrayList<Spec>();
+    }
+
+    public void add(Spec spec) {
+        if (spec instanceof Union) {
+            return;
+        } else {
+            specs.add(spec);
+        }
+    }
+
+    public String toString() {
+        StringBuilder builder = new StringBuilder();
+
+        Iterator<Spec> it = specs.iterator();
+        for (;;) {
+            Spec spec = it.next();
+            String annotation = spec.getAnnotation();
+
+            if (annotation != null) {
+                builder.append(" ");
+                builder.append(spec.getAnnotation());
+            }
+
+            builder.append("\n");
+            builder.append(spec.toString());
+
+            if (it.hasNext()) {
+                builder.append("and");
+            } else {
+                break;
+            }
+        }
+
+        return builder.toString();
+    }
+}