I am using Methontology as Methodology for the construction of a Ontology, in the task 7 for this methodology "Task 7: To define class attributes in detail", I know how to add the instance attributes in Protege but I don't know how to add the class attributes in Protege 5.0.
I send you the tables of class attributes and instance attributes, for show the diference between them
Atributes of class
Atributes of Instance
"Class attributes" that apply to the class rather than to instances of the class are modelled in OWL as annotation properties.
Related
I am trying to implement an ontology in Protege. I have a class Murder and a class Person. The class Murder is connected to class Person by two object properties that are:
hasCriminal --> domain Murder, range Person
hasVictim --> domain Murder, range Person
I would like to express that class Murder needs to have a Victim who is dead. So i put a data property of Person named dead of type boolean (yes or no).
How can I say in class Murder that the data property "dead" of Person should be put true?
Thanks in advance.
I'm new in Protegé. I've created a new Ontology and I would like to merge the Person class with Person class in foaf.
How can I do that? I have tried with Equivalent to but I don't see both ontologies linked in http://www.visualdataweb.de/webvowl
Foaf and mine ontologies separated
I found the solution. I realized that Person class in my ontology is a subclass in foaf antology.
So, I've added as a subclass in Protegé and it worked :)
I wanna get ontology classes but not in a randomly way, I'm looking for a way to get them by their hierarchical levels: I mean showing for each level of the ontology its classes; is it possible, knowing that I'm using OWL API.
OWLDataFactory df = OWLManager.getOWLDataFactory();
OWLReasoner reasoner = ...
NodeSet<OWLClass> subClasses = reasoner.getSubClasses(df.getOWLThing(), true);
subClasses will contain the set of direct subclasses of owl:Thing - i.e., the classes one level below owl:Thing. From there, you can apply the same call for each entity in the NodeSet to visit the class graph. You'll of course need an OWLReasoner implementation to create the reasoner object.
I'm using protege to test OWL Ontologies for my program.
Is there a way to ask in the DL Query tab if an entity is a subclass of another entity?
The autocomplete tab does not suggest the keyword subclass.
There is no concept of ASK queries in the DL Query Tab. The idea is to write Class Expressions and then do inferences based on what you selected in the check box section.
Thus, to check if a class A is a subclass of a class B, the idea would be to use A and then compute the super classes and check if B is contained in the result.
See the documentation
An alternative query language would be SPARQL.
Protégé 5.5. :
In the DL query window :
enter the entity name
In the "Query for"
check "Subclasses"
Press execute
In the class declaration line of the model (.php) files, I'm trying to extend off of a different class then AppModel. Let's say I have some models, including Model, ModelOrder, and ModelLastShipment, etc. And yes, "Model" is a made up name for the sake of generalization.
Model does not use a table and does not have any table association. It extends AppModel. It has some basic functions that I'd like ModelOrder and ModelLastShipment (and other Model... classes) to inherit. The problem is that while ModelOrder can be extended (i.e. class ModelOrder extends Model {...}), I'm unable to do the same with the following because of a missing file error.
model_last_shipment.php:
class ModelLastShipment extends Model {...}
This returns the error,
Fatal error: Class 'Model' not found in C:\xampp\htdocs\my_app\app\models\model_last_shipment.php on line 3
Including include_once('model.php') before the declaration solves this issue, but why does the extension work for ModelOrder without explicit inlcusion but not for ModelLastShipment?
Please let me know if there is more information needed to resolve this. There are many articles and posts regarding this sort of error, but I've yet to find out why I'm getting this error for one and not for another.
Let's say I have some models, including Model
It's impossible to create a class named "Model"
Model is a core class. If you create a class named Model, it with either not be loaded (because the class Model already exists) or cause fatal behavior - possibly "at random".
The class structure in the question is:
Overloadable (Cake)
Model (Cake)
AppModel (App)
Model (App) <- problem
That cannot work. Class names must be unique and Model is a core class.
Including include_once('model.php') before the declaration solves this issue
Are these model class names made up? As stated above that isn't possible with a class named Model.
Intermediary class models are not automatically loaded
These are the only model classes that are loaded automatically in Cake 1.3:
Model
AppModel
AppModel (when appropriate)
If the class hierarchy of your models is such that there are more intermediary classes - they need to be loaded explicitly:
<?php
App::import('Model', 'SomethingElse');
class NotNamedModel extends SomethingElse {