这里是Protege教程中一些比较重要的片段，完整教程在http://www.crabone.com/index.php/protege-introduction#more-6
当我们再次回顾创建类的6种方法时，我们可曾反过来想想，如果让我们来设计OWL语言，我们会设计出几类创建类的方法？
这块板是属于木头的——类：木头（名词型）
你是是很有理想的——类：很有理想的（有：动词；理想：名词；属于动宾型）
这个材料既是属于树胶又是属于塑料的——类：树胶∩塑料（名词和名词的集合型）
他是男人——类：男人（名词型）
它是吃肉的。（吃：动词；肉：名词；属于动宾型）
他是有一颗赤诚热心的人——类1∩类2；类1：人（名词型）；类二：有一颗赤诚热心的（量词动宾型）
这类皇冠都镶有No.1098型钻石——类：镶有No.1098型钻石的（具体个体的动宾型）
这批货物要么是可乐瓶，要么是啤酒瓶——枚举类：类1和类二
我们会发现，上面的这些类的定义方法， 阅读全文…
Protégé
OWL, Protégé, 入门, 学习资料, 教程
其实就是一个属性的类型和范围，比如 int i；3<i<10 那么int就是i的domain，range就是3-10。
用英文来形象的表达就是：Properties link individuals from the domain to individuals from the range.
在我们这个Organization的例子中，我们拿hasInterest这个Property来说，它的domain就是Organization，它的Range就是Interest。
注意！Properties的domain，range和Properties的6大特性不一样，6大特性那是一种推理机制要用到的约束——Constraint，而domain，range是一种公理——axiom。什么意思？约束是用来限制的，可以用推理机制来验证，如果限制出了问题就会推理出错。而公理总是对的，推理要基于它们来推理。举个例子，hasTopping的domain我们定义为Pizza，如果在本体上，发现hasTopping连接到了icecream，那么是不会报错的，OWL会认为，icecream为Pizza的子类，这在W3C的文档上有详细的语义推理定义，见下面的公式。除非……你在构建本体的时候强行定义了，icecream和Pizza是相互Disjoint的，见3.5节。
if
T(?p, rdfs:domain, ?c1)
T(?c1, rdfs:subClassOf, ?c2)
then
T(?p, rdfs:domain, ?c2)
Protégé
OWL, Protégé, 入门, 学习资料, 教程
这里是Protege教程中一些比较重要的片段，完整教程在http://www.crabone.com/index.php/protege-introduction#more-6
OWL Properties代表了一种关系 relationship，在OWL里，有2种类型的Properties。一种叫Object Properties，代表了individual到individual之间的一种关系。还有一种叫Datatype Properties，代表了individual和基本数据类型的关系，有点像类的属性，比如年龄、身高等。还有一种叫Annotation properties，是属于元数据，数据的数据，可以用来解释Classes、Individual、Object/Datatype Properties。下图以这3种类型，举个例子：
阅读全文…
Protégé
OWL, Protégé, 入门, 学习资料, 教程
这里是Protege教程中一些比较重要的片段，完整教程在http://www.crabone.com/index.php/protege-introduction#more-6
DisjointClasses、SubClassOf、EquivalentClasses是类的三大公理，见下图：
SubClassOf已经在上一节讲过了， 阅读全文…
Protégé
OWL, Protégé, 入门, 学习资料, 教程
这里是Protege教程中一些比较重要的片段，完整教程在http://www.crabone.com/index.php/protege-introduction#more-6
创建类，有6种方式，在我的OWL入门教程中，有非常详细的阐述，想了解的朋友去看看。
6种创建类的方法
在创建本体的时候，用的最多的当然是第一种方法————Named Class。这种Class也被称为Plain Class，意思就是没有任何语义的类，仅仅是一个标示。好了，我们开始！
阅读全文…
Protégé
OWL, Protégé, 入门, 学习资料, 教程
用Protege做本体开发，一定要搞清楚Protege的版本，这点很重要。
| Protege 3.x |
Protege 4.0 |
|
|
|
| Frames Support |
Frames Support |
| Frames editing supported via the Protege-Frames editor |
None (Protege-Frames editor has not been migrated yet) |
| OWL Support |
OWL Support |
| OWL 1.0 language support |
OWL 2.0 language support |
| OWL and RDF(S) support |
Pure OWL framework |
| OWL and RDF(S) files are accessible via the Protege-OWL API. This API layered OWL and RDF support over the existing Frames API. |
OWL files are accessible via the OWL API, which was developed at the The University Of Manchester (not the Protege-OWL API, which was used in the 3.x series). This is a very clean API that closely follows the OWL specification and the parser is optimized to be faster and use less memory. |
| SPARQL support |
No SPARQL support yet |
| SWRL support |
No SWRL support yet |
| Support for meta-modeling (allowing OWL Full) |
No OWL Full |
| Reasoner support through HTTP DIG interface allows connection to any DIG compliant reasoner, as well as direct connection to the Pellet reasoner |
Direct connection to FaCT++ and Pellet for optimum speed of classification |
| Configuration settings stored in Protege Project files (.pprj) |
No project files, configuration settings persist across installations of Protege |
| OWL imports handled through a repository mechanism |
Simplified imports resolution from a common folder (repositories also supported) |
| Plugins |
Plugins |
| Plugin framework developed at Stanford for tab widgets, slot widgets, back-ends, projects, importing, and exporting |
Plugin framework was switched to the more industry standard OSGi, which allows for any type of plugin extension |
| Large set of plugins available, developed both in-house and externally by the Protege community |
Migration of plugins to Protege 4 is in the beginning stages, but an increasing number are becoming available |
| User Interface |
User Interface |
| Tab and slot widgets make much of user interface configurable |
Plugins define all user interface elements including tabs, views, and menus making everything configurable |
| Access is provided to the meta model and can be used to configure the user interface |
Menu and drag and drop user interface elements |
| Multi-user Support |
Multi-user Support |
| Multiple users can edit the same ontology using the client-server version of Protege |
None (Protege Client-Server has not been migrated yet) |
| Database Storage Model |
Database Storage Model |
| Ability to store ontologies in a database provided by the JDBC database back-end |
None (database back-end has not been migrated yet) |
初学者常犯的错误就是用protege-owl API来编辑4.0的OWL2.0文件，OWL2.0要用OWL API来编辑。
Protégé
OWL API, OWL1.0, OWL2.0, protege OWL, Protege OWL API, protege 版本
