diff --git a/NEWS.txt b/NEWS.txt
index 950e37096..8383c0420 100644
--- a/NEWS.txt
+++ b/NEWS.txt
@@ -42,7 +42,7 @@
  * Use MusicBrainz Server translations for release groups, medium formats and cover art types
  * Add checkbox to toggle debug at runtime in log/debug view dialog
  * Add a plugin to add Artist Official Homepage relationships to the website tag (ID3 WOAR tag)
-
+ * Add integrated functions $eq_any, $ne_all, $eq_all, $ne_any, $swapprefix and $delprefix.
 
 
 Version 1.2 - 2013-03-30
diff --git a/contrib/plugins/swapprefix.py b/contrib/plugins/swapprefix.py
deleted file mode 100644
index 20a59f802..000000000
--- a/contrib/plugins/swapprefix.py
+++ /dev/null
@@ -1,51 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Picard plugin swapprefix
-# Adds the swapprefix tagger script function.
-# This function offers the same functionality as the one in Foobar2000.
-# See http://wiki.hydrogenaudio.org/index.php?title=Foobar2000:Title_Formatting_Reference
-#
-# Copyright (C) 2010 Philipp Wolfer
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License
-# as published by the Free Software Foundation; either version 2
-# of the License, or (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
-
-PLUGIN_NAME = 'swapprefix function'
-PLUGIN_AUTHOR = 'Philipp Wolfer'
-PLUGIN_DESCRIPTION = 'Moves the specified prefixes to the end of a string.'
-PLUGIN_VERSION = "0.1"
-PLUGIN_API_VERSIONS = ["0.9.0", "0.10", "0.11", "0.12", "0.15"]
-
-from picard.script import register_script_function
-import re
-
-
-def swapprefix(parser, text, *prefixes):
-    """
-    Moves the specified prefixes to the end of text.
-    If no prefix is specified 'A' and 'The' are taken
-    as default.
-    """
-    if not prefixes:
-        prefixes = ('A', 'The')
-    for prefix in prefixes:
-        pattern = re.compile('^' + re.escape(prefix) + '\s')
-        match = pattern.match(text)
-        if match:
-            rest = pattern.split(text)[1].strip()
-            if rest:
-                return ", ".join((rest, match.group(0).rstrip()))
-    return text
-
-register_script_function(swapprefix)
diff --git a/picard/script.py b/picard/script.py
index b7d7f157c..b0e4145ca 100644
--- a/picard/script.py
+++ b/picard/script.py
@@ -632,6 +632,84 @@ def func_truncate(parser, text, length):
     return text[:length].rstrip()
 
 
+def func_swapprefix(parser, text, *prefixes):
+    """
+    Moves the specified prefixes to the end of text.
+    If no prefix is specified 'A' and 'The' are taken as default.
+    """
+    # Inspired by the swapprefix plugin by Philipp Wolfer.
+
+    text, prefix = _delete_prefix(parser, text, *prefixes)
+    if prefix != '':
+        return text + ', ' + prefix
+    return text
+
+def func_delprefix(parser, text, *prefixes):
+    """
+    Deletes the specified prefixes.
+    If no prefix is specified 'A' and 'The' are taken as default.
+    """
+    # Inspired by the swapprefix plugin by Philipp Wolfer.
+
+    return _delete_prefix(parser, text, *prefixes)[0]
+
+def _delete_prefix(parser, text, *prefixes):
+    """
+    Worker function to deletes the specified prefixes.
+    Returns remaining string and deleted part separately.
+    If no prefix is specified 'A' and 'The' used.
+    """
+    # Inspired by the swapprefix plugin by Philipp Wolfer.
+
+    if not prefixes:
+        prefixes = ('A', 'The')
+    text = text.strip()
+    match = re.match('(' + r'\s+)|('.join(prefixes) + r'\s+)', text)
+    if match:
+        pref = match.group()
+        return text[len(pref):], pref.strip()
+    return text, ''
+
+
+def func_eq_any(parser, x, *args):
+    """
+    Return True if one string matches any of one or more other strings.
+    $eq_any(a,b,c ...) is functionally equivalent to $or($eq(a,b),$eq(a,c) ...)
+    Example: $if($eq_any(%artist%,foo,bar,baz),$set(engineer,test))
+    """
+    # Inspired by the eq2 plugin by Brian Schweitzer.
+    return '1' if x in args else ''
+
+def func_ne_all(parser, x, *args):
+    """
+    Return True if one string doesn't match all of one or more other strings.
+    $ne_all(a,b,c ...) is functionally equivalent to $and($ne(a,b),$ne(a,c) ...)
+    Example: $if($ne_all(%artist%,foo,bar,baz),$set(engineer,test))
+    """
+    # Inspired by the ne2 plugin by Brian Schweitzer.
+    return '1' if x not in args else ''
+
+
+def func_eq_all(parser, x, *args):
+    """
+    Return True if all string are equal.
+    $eq_all(a,b,c ...) is functionally equivalent to $and($eq(a,b),$eq(a,c) ...)
+    Example: $if($eq_all(%albumartist%,%artist%,Justin Bieber),$set(engineer,Meat Loaf))
+    """
+    for i in args:
+        if x != i:
+            return ''
+    return '1'
+
+def func_ne_any(parser, x, *args):
+    """
+    Return True if all strings are not equal.
+    $ne_any(a,b,c ...) is functionally equivalent to $or($ne(a,b),$ne(a,c) ...)
+    Example: $if($ne_any(%albumartist%,%trackartist%,%composer%),$set(lyricist,%composer%))
+    """
+    return func_not(parser, func_eq_all(parser, x, *args))
+
+
 register_script_function(func_if, "if", eval_args=False)
 register_script_function(func_if2, "if2", eval_args=False)
 register_script_function(func_noop, "noop", eval_args=False)
@@ -675,3 +753,9 @@ register_script_function(func_firstalphachar, "firstalphachar")
 register_script_function(func_initials, "initials")
 register_script_function(func_firstwords, "firstwords")
 register_script_function(func_truncate, "truncate")
+register_script_function(func_swapprefix, "swapprefix", check_argcount=False)
+register_script_function(func_delprefix, "delprefix", check_argcount=False)
+register_script_function(func_eq_any, "eq_any", check_argcount=False)
+register_script_function(func_ne_all, "ne_all", check_argcount=False)
+register_script_function(func_eq_all, "eq_all", check_argcount=False)
+register_script_function(func_ne_any, "ne_any", check_argcount=False)
diff --git a/test/test_script.py b/test/test_script.py
index c79095374..a0840dd81 100644
--- a/test/test_script.py
+++ b/test/test_script.py
@@ -254,3 +254,39 @@ class ScriptParserTest(unittest.TestCase):
         context["target"] = "targetval"
         context["source"] = "sourceval"
         self._eval_and_check_copymerge(context, ["targetval", "sourceval"])
+
+    def test_cmd_eq_any(self):
+        self.assertEqual(self.parser.eval("$eq_any(abc,def,ghi,jkl)"), "")
+        self.assertEqual(self.parser.eval("$eq_any(abc,def,ghi,jkl,abc)"), "1")
+
+    def test_cmd_ne_all(self):
+        self.assertEqual(self.parser.eval("$ne_all(abc,def,ghi,jkl)"), "1")
+        self.assertEqual(self.parser.eval("$ne_all(abc,def,ghi,jkl,abc)"), "")
+
+    def test_cmd_eq_all(self):
+        self.assertEqual(self.parser.eval("$eq_all(abc,abc,abc,abc)"), "1")
+        self.assertEqual(self.parser.eval("$eq_all(abc,abc,def,ghi)"), "")
+
+    def test_cmd_ne_any(self):
+        self.assertEqual(self.parser.eval("$ne_any(abc,abc,abc,abc)"), "")
+        self.assertEqual(self.parser.eval("$ne_any(abc,abc,def,ghi)"), "1")
+
+    def test_cmd_swapprefix(self):
+        self.assertEqual(self.parser.eval("$swapprefix(A stitch in time)"), "stitch in time, A")
+        self.assertEqual(self.parser.eval("$swapprefix(The quick brown fox)"), "quick brown fox, The")
+        self.assertEqual(self.parser.eval("$swapprefix(How now brown cow)"), "How now brown cow")
+        self.assertEqual(self.parser.eval("$swapprefix(When the red red robin)"), "When the red red robin")
+        self.assertEqual(self.parser.eval("$swapprefix(A stitch in time,How,When,Who)"), "A stitch in time")
+        self.assertEqual(self.parser.eval("$swapprefix(The quick brown fox,How,When,Who)"), "The quick brown fox")
+        self.assertEqual(self.parser.eval("$swapprefix(How now brown cow,How,When,Who)"), "now brown cow, How")
+        self.assertEqual(self.parser.eval("$swapprefix(When the red red robin,How,When,Who)"), "the red red robin, When")
+
+    def test_cmd_delprefix(self):
+        self.assertEqual(self.parser.eval("$delprefix(A stitch in time)"), "stitch in time")
+        self.assertEqual(self.parser.eval("$delprefix(The quick brown fox)"), "quick brown fox")
+        self.assertEqual(self.parser.eval("$delprefix(How now brown cow)"), "How now brown cow")
+        self.assertEqual(self.parser.eval("$delprefix(When the red red robin)"), "When the red red robin")
+        self.assertEqual(self.parser.eval("$delprefix(A stitch in time,How,When,Who)"), "A stitch in time")
+        self.assertEqual(self.parser.eval("$delprefix(The quick brown fox,How,When,Who)"), "The quick brown fox")
+        self.assertEqual(self.parser.eval("$delprefix(How now brown cow,How,When,Who)"), "now brown cow")
+        self.assertEqual(self.parser.eval("$delprefix(When the red red robin,How,When,Who)"), "the red red robin")