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Re: ANN: OWL API (Java version and XSLT version)

From: <MDaconta@aol.com>
Date: Sun, 8 Jun 2003 12:57:42 EDT
Message-ID: <34.3add26e1.2c14c506@aol.com>
To: costello@mitre.org, www-rdf-interest@w3.org
In a message dated 6/8/2003 9:27:14 AM US Mountain Standard Time, 
costello@mitre.org writes:

> I have implemented an OWL API.  It comes in two flavors: Java and XSLT.
> Here is the URL:
>   http://www.xfront.com/owl/api/

Nice start!

General comments:

1. Needs to be in a package.
2. Should separate these accessor type functions into an interface like this:

package com.xfront.owl;

 * @author Michael C. Daconta
public interface OwlAccessor 
    public String getProperties(String classURI);
    public String getEquivalentProperties(String propertyURI);     
    public String getSuperClasses(String classURI); 
    public String getPropertyTypes(String propertyURI); 
    public String getClassSpecificPropertyDefinitions(String classURI, String 
    public String getDomain(String propertyURI);
    public String getRange(String propertyURI);
    public String getInstances(String classURI);
    public String getEquivalentClasses(String classURI);

3. Use a factory pattern (like DocumentBuilder) to separate the source from 
accessor.  Then, your implementation, would be either the FileBuilder or 
FileSource which would return an instance of a Class which implements 
OwlAccessor.  Like this:

OwlAccessor accessor = OwlFactory.configure(File f);

Which would return your OWL_API class (although this is not a good name for
a Class).  I would rename your class to something like OwlFileAccessor.

4.  Java has a URI class which would is more suitable than Strings because 
validity of the URI will be tested by the URI class.  

I will try and find time to look at each methods parameters and return types 
to determine
if their are better alternatives.

Again, good start ...

 - Mike
Michael C. Daconta
Chief Scientist, APG, McDonald Bradley, Inc.
Received on Sunday, 8 June 2003 12:58:04 UTC

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