diff --git a/src/linkahead/common/models.py b/src/linkahead/common/models.py
index 1dbeb802311c7afaea2340af15e49537520ef57f..fe2be59ad5b042db23cc0a567476bf9aa03d99ad 100644
--- a/src/linkahead/common/models.py
+++ b/src/linkahead/common/models.py
@@ -765,11 +765,18 @@ class Entity:
         this method will created a new message from the parameters type, code,
         description, and body.
 
-        @param msg: The message to be added to this entity.
-        @param type: The type of the message to be added.
-        @param code: The code of the message to be added.
-        @param description: The description of the message to be added.
-        @param body: The body of the message to be added.
+        Parameters
+        ----------
+        msg : string
+          The message to be added to this entity.
+        type :
+          The type of the message to be added.
+        code :
+          The code of the message to be added.
+        description :
+          The description of the message to be added.
+        body :
+          The body of the message to be added
         """
 
         if msg is not None:
@@ -874,7 +881,7 @@ class Entity:
 
         Returns
         -------
-        out: bool
+        bool
           True if ``parent`` is a true parent, False otherwise.
         """
 
@@ -900,10 +907,13 @@ class Entity:
 
         return name_result and id_result
 
-    def get_parents(self):
+    def get_parents(self)->ParentList:
         """Get all parents of this entity.
 
-        @return: ParentList(list)
+        Returns
+        -------
+        ParentList
+          list of parents
         """
 
         return self.parents
@@ -919,7 +929,7 @@ class Entity:
 
         Returns
         -------
-        out: list[Entity]
+        list[Entity]
           The parents of this Entity
         """
 
@@ -934,9 +944,15 @@ class Entity:
         As a side effect of this method, the ancestors are added to
         all_parents.
 
-        @param all_parents: list, The added parents so far.
+        Parameters
+        ----------
+        all_parents: list 
+          The added parents so far.
 
-        @return: None, but see side effects.
+        Returns
+        -------
+        None
+          but see side effects.
         """
 
         for parent in self.parents:
@@ -1003,7 +1019,10 @@ class Entity:
     def get_properties(self):
         """Get all properties of this entity.
 
-        @return: PropertyList(list)
+        Returns
+        -------
+        PropertyList
+          list of properties
         """
 
         return self.properties
@@ -1019,7 +1038,7 @@ class Entity:
 
         Returns
         -------
-        property : Property
+        Property
             The first Property of this Entity with a matching name or id.
 
         """
@@ -1163,7 +1182,10 @@ class Entity:
     def get_messages(self):
         """Get all messages of this entity.
 
-        @return: Messages(list)
+        Returns
+        -------
+        Messages
+          list of messages
         """
 
         return self.messages
@@ -1171,7 +1193,10 @@ class Entity:
     def get_warnings(self):
         """Get all warning messages of this entity.
 
-        @return Messages(list): Warning messages.
+        Returns
+        -------
+        Messages:
+           Warning messages.
         """
         ret = Messages()
 
@@ -1184,7 +1209,10 @@ class Entity:
     def get_errors(self):
         """Get all error messages of this entity.
 
-        @return Messages(list): Error messages.
+        Returns
+        -------
+        Messages
+          Error messages.
         """
         ret = Messages()
 
@@ -1201,8 +1229,11 @@ class Entity:
         """Get all error messages of this entity and all sub-entities /
         parents / properties.
 
-        @return A list of tuples. Tuple index 0 contains the error message
-                and tuple index 1 contains the tree.
+        Returns
+        -------
+        list[tuple[str, list[Entity]]]
+           A list of tuples. Tuple index 0 contains the error message
+           and tuple index 1 contains the tree.
         """
         roots = [] if roots is None else roots
         result_list = list()
@@ -1219,7 +1250,10 @@ class Entity:
 
     def has_errors(self):
         '''
-        @return True: if and only if this entities has any error messages.
+        Returns
+        -------
+        bool
+            True: if and only if this entities has any error messages.
         '''
 
         for m in self.messages:
@@ -1247,7 +1281,10 @@ class Entity:
         FIXME: Add documentation for the add_properties parameter.
         FIXME: Add docuemntation for the local_serialization parameter.
 
-        @return: xml representation of this entity.
+        Returns
+        -------
+        etree._Element
+          xml representation of this entity.
         """
 
         if xml is None:
@@ -1509,11 +1546,16 @@ class Entity:
         returns a Container object which carries the returned entities. They are
         distinct from this one. This entity will no be changed somehow.
 
-        @param unique=True: flag to suppress the ambiguity exception.
+        Parameters
+        ----------
+        unique : bool =True 
+           flag to suppress the ambiguity exception.
 
-        @return
-        Container with the returned entities or single entity if and only
-        if unique was True and no exception was raised.
+        Returns
+        -------
+        Container
+            Container with the returned entities or single entity if and only
+            if unique was True and no exception was raised.
 
         """
 
@@ -1606,7 +1648,10 @@ class Entity:
         anyway. Set flag 'strict' to True in order to force the server to take all warnings as
         errors.  This prevents the server from updating this entity if any warnings occur.
 
-        @param strict=False: Flag for strict mode.
+        Parameters
+        ----------
+        strict: bool = False
+            Flag for strict mode.
         """
 
         return Container().append(self).update(
@@ -2252,23 +2297,7 @@ class File(Record):
     look at `test_files.py` in the Python integration tests of the
     `load_files.py` script in the advanced user tools.
 
-    @param name: A name for this file record (That's an entity name - not to be
-        confused with the last segment of the files path).
-    @param id: An ID.
-    @param description: A description for this file record.
-    @param path: The complete path, including the file name, of the file in the
-        server's "caosroot" file system.
-    @param file: A local path or python file object.  The file designated by
-        this argument will be uploaded to the server via HTTP.
-    @param pickup: A file/folder in the DropOffBox (the server will move that
-        file into its "caosroot" file system).
-    @param thumbnail: (Local) filename to a thumbnail for this file.
-    @param properties: A list of properties for this file record. @todo is this
-        implemented?
-    @param from_location: Deprecated, use `pickup` instead.
-
-    """
-
+"""
     def __init__(
         self,
         name: Optional[str] = None,
@@ -2280,6 +2309,33 @@ class File(Record):
         thumbnail: Optional[str] = None,
         from_location=None,
     ):
+        """
+        Parameters
+        ----------
+        name: str
+            A name for this file record (That's an entity name - not to be
+            confused with the last segment of the files path).
+        id: Union[str, int]
+            An ID.
+        description: str
+            A description for this file record.
+        path: str
+            The complete path, including the file name, of the file in the
+            server's "caosroot" file system.
+        file: Union[str, file]
+        A local path or python file object.  The file designated by
+            this argument will be uploaded to the server via HTTP.
+        pickup: str
+            A file/folder in the DropOffBox (the server will move that
+            file into its "caosroot" file system).
+        thumbnail: str
+            (Local) filename to a thumbnail for this file.
+        properties: list[Property]
+            A list of properties for this file record. @todo is this
+            implemented?
+        from_location: str
+            Deprecated, use `pickup` instead.
+        """
         Record.__init__(self, id=id, name=name, description=description)
         self.role = "File"
         self.datatype = None
@@ -2308,7 +2364,10 @@ class File(Record):
     ) -> etree._Element:
         """Convert this file to an xml element.
 
-        @return: xml element
+        Returns
+        -------
+        etree.Element
+            xml element
         """
 
         if xml is None:
@@ -2321,8 +2380,15 @@ class File(Record):
         """Download this file-entity's actual file from the file server. It
         will be stored to the target or will be hold as a temporary file.
 
-        @param target: Where to store this file.
-        @return: local path of the downloaded file.
+        Parameters
+        ----------
+        target: Optional[str] 
+            Where to store this file.
+
+        Returns
+        -------
+        str
+            local path of the downloaded file.
         """
         self.clear_server_messages()
 
@@ -2434,8 +2500,14 @@ class PropertyList(list):
         """Get a property of this list via it's name. Raises a LinkAheadException
         if not exactly one property has this name.
 
-        @param name: the name of the property to be returned.
-        @return: A property
+        Parameters
+        ----------
+        name: str
+            the name of the property to be returned.
+        Returns
+        -------
+        Entity
+            A property
         """
 
         return self._element_by_name[name]
@@ -2541,8 +2613,14 @@ class PropertyList(list):
         '''
         Get the first entity which has the given cuid.
         Note: this method is intended for internal use.
-        @param name: The cuid of the entity to be returned.
-        @return: Entity with the given cuid.
+        Parameters
+        ----------
+        name: str 
+            The cuid of the entity to be returned.
+        Returns
+        -------
+        Entity
+            Entity with the given cuid.
         '''
 
         for e in self:
@@ -2599,8 +2677,15 @@ class ParentList(list):
         '''
         Get the first entity which has the given cuid.
         Note: this method is intended for internal use.
-        @param name: The cuid of the entity to be returned.
-        @return: Entity with the given cuid.
+        Parameters
+        ----------
+        name: str
+            The cuid of the entity to be returned.
+
+        Returns
+        -------
+        Entity 
+            Entity with the given cuid.
         '''
 
         for e in self:
@@ -3136,8 +3221,14 @@ class Container(list):
         '''
         Get the first entity which has the given cuid.
         Note: this method is intended for internal use.
-        @param name: The cuid of the entity to be returned.
-        @return: Entity with the given cuid.
+        Parameters
+        ----------
+        name: str
+            The cuid of the entity to be returned.
+        Returns
+        -------
+        Entity
+            Entity with the given cuid.
         '''
 
         for e in self:
@@ -3152,8 +3243,14 @@ class Container(list):
         entities are in this list which have the same id, this method will only
         return the first and ignore the others.
 
-        @param name: The id of the entity to be returned.
-        @return: Entity with the given id.
+        Parameters
+        ----------
+        id: Union[int, str]
+            The id of the entity to be returned.
+        Returns
+        -------
+        Entity
+            Entity with the given id.
         """
 
         for e in self:
@@ -3185,9 +3282,16 @@ class Container(list):
         entities are in this list which have the same name, this method will
         only return the first and ignore the others.
 
-        @param name: the name of the entity to be returned.
-        @param case_sensitive (True/False): Do a case-sensitive search for name (or not).
-        @return: Entity with the given name.
+        Parameters
+        ----------
+        name: str
+            the name of the entity to be returned.
+        case_sensitive: bool
+            Do a case-sensitive search for name (or not).
+        Returns
+        -------
+        Entity 
+            Entity with the given name.
         """
 
         for e in self:
@@ -3305,7 +3409,10 @@ class Container(list):
     def get_errors(self):
         """Get all error messages of this container.
 
-        @return Messages: Error messages.
+        Returns
+        -------
+        Messages
+            Error messages.
         """
 
         if self.has_errors():
@@ -3322,7 +3429,10 @@ class Container(list):
     def get_warnings(self):
         """Get all warning messages of this container.
 
-        @return Messages: Warning messages.
+        Returns
+        -------
+        Messages 
+            Warning messages.
         """
 
         if self.has_warnings():
@@ -3351,7 +3461,10 @@ class Container(list):
 
     def has_warnings(self):
         '''
-        @return True: if and only if this container has any warning messages.
+        Returns
+        -------
+        bool 
+            True if and only if this container has any warning messages.
         '''
 
         for m in self.messages:
@@ -3362,7 +3475,10 @@ class Container(list):
 
     def has_errors(self):
         '''
-        @return True: if and only if this container has any error messages.
+        Returns
+        -------
+        bool
+            True if and only if this container has any error messages.
         '''
 
         for m in self.messages:
@@ -3389,7 +3505,10 @@ class Container(list):
     def from_xml(xml_str):
         """Creates a Container from the given xml string.
 
-        @return The created Container.
+        Returns
+        -------
+        Container
+            The created Container.
         """
 
         c = Container()
@@ -3669,7 +3788,7 @@ class Container(list):
 
         Returns
         -------
-        out : set
+        set
           A set of IDs of unique elements that are a dependency of another element of ``container``.
         """
         item_id = set()
@@ -5244,8 +5363,14 @@ def parse_xml(xml: Union[str, etree._Element]):
     """parse a string or tree representation of an xml document to a set of
     entities (records, recordtypes, properties, or files).
 
-    @param xml: a string or tree representation of an xml document.
-    @return: list of entities or single entity.
+    Parameters
+    ----------
+    xml: Union[str, etree._Element] 
+       a string or tree representation of an xml document.
+    Returns
+    -------
+    Union[Entity, list[Entity]
+      list of entities or single entity.
     """
 
     if isinstance(xml, etree._Element):