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Timothy — Sat, 17 Mar 2007 06:58:00 GMT

前段旉��学习(f��n)了点基本的OWL-S,没想到能用protege插�g�Ҏ(gu��)��务进行组合，真的蛮不错的�Q?br />本�h费了�?ji��)牛二虎之力��x��照下面�{载的文章照做一下，很难成功�Q�不知道是不是插件与protege的版本冲�H�还是怎么的，��是用不了！
�q�运的是�Q�在上十�ơ重装后�Q�终于按照步骤作好了。下面的文章是�{载的�Q�URL�Q?a >http://www.cnblogs.com/bjzhanghao/archive/2005/06/12/173302.html�Q?感谢作者的贡献。在阅读之前�Q�我提两个徏议：(x��)
1。安装版本是protege 3.2 with jvm 和owlseditor-build20�Q�徏议大家不要自己制定JVM�Q�这样就不会(x��)出现某些�c�L��不着的情况了�Q?br />2。边实践边考虑�Q�会(x��)��L(f��ng)��非浅�Q?/p>

OWL-S可以用来描述Web服务�Q�这个帖子将介绍一个非常简单的例子�Q�也许对理解Web服务的组装有些作用。这个服务是对已有Web服务�q�行�l�装和执行，所以你�q�不需要发布自��q��Web服务。你需要安�?a >Protege�?a >OWL-S Editor插�g�Q�我用的版本前者是3.1 beta build 191�Q�后者是build 15�Q�它们在一赯��行得�q�不错�?/p>

所用的Web服务�?a >http://www.bs-byg.dk/hashclass.wsdl�Q�它包含两个�Ҏ(gu��)��Q�HashString和CheckHash�Q�前者用指定�~�码方式�Q�MD5、SHA1�{�等�Q�对指定字符串编码，后者根据指定编码方式检查一个字�W�串�Q�HashString�Q�是否是另一个字�W�串�Q�OriginString�Q�的�~�码�l�果。我们将把这两个�Ҏ(gu��)��l�装成一个服务，对输入的�~�码方式和待�~�码字符串先�q�行�~�码�Q�然后检查编码的�l�果是否正确�Q�如果正��返回true�Q�否则返回false。下面是�l�装步骤�Q�完整的工程�?a >�q�里下蝲�?/p>

1、确认你的OWL-S Editor已经安装到Protege里，启动Protege�Q�新��Z��个owl文�g�c�d��的工�E�，在菜单project->config里勾选上owls选项�Q�按��定后Protege的主界面�?x��)多��Z��个OWL-S Editor��c�?/p>

2、�{到OWL-S Editor��，按左上角的WSDL按钮�Q�在弹出的对话框里输入Web服务的地址http://www.bs-byg.dk/hashclass.wsdl�Q�然后按回�R�Q�过一�?x��)儿在对话框里�?x��)昄��个Web服务的信息，左边是Operations列表�?/p>

�? 用来导入WSDL的对话框

3、因为每�ơ只能import一个Operation�Q�所以先选择HashString�Q�然后按右下方的Import按钮�Q�这时系�l�会(x��)提示要把生成的owls文�g�Q�扩展名�?owl�Q�保存在一个位�|�，你可以选择��M��位置�?/p>

4、��用同��L(f��ng)��Ҏ(gu��)��把CheckHash�Ҏ(gu��)��也导入进来，�q�样我们��有了两个可用于�l�装的Web服务了。如果你愿意的话�Q�可以单独执行看看，�Ҏ(gu��)��是选择一个Service�Q�然后按�l�色的执行按钮�?/p>

�? 导入的两个服�?/p>

5、现在开始组装它们。�ؓ(f��)此我们新��Z��个Service实例�Q�按Create Service按钮�Q�、一个Profile实例、一个CompositeProcess实例和一个WSDLGrounding实例�Q�分别命名�ؓ(f��)myservice、myprofile、myprocess和mygrounding好了�?/p>

6、接下来把它们连接�v来，首先选中myservice�Q�把它的describedBy属性置为myprocess�Q�presents属性置为myprofile�Q�supports属性置为mygrounding�?/p>

7、现在对myprocess�q�行�~�辑�Q�OWL-S Editor提供了一个可视化的编辑界面（Visual Editor�Q�，利用它可以很方便的定义CompositeProcess的各个步骤。选中myprocess�Q�右边切换到Visual Editor�Q�这里有一些粉�U�色的按钮用来定制流�E�。我们首先创��Z��个Sequence�Q�表�C�按��序执行�Q�，然后选中�q�个Sequence�Q�创��Z��个Perform和一个Produce�Q�每个Perform代表调用一个Web服务�Q�而Produce的作用是在最后得到返回倹{��这时右边的囑�Ş应该像下面这��P��因�ؓ(f��)我们��未对Perform和Produce�q�行定制�?/p>

�? 包含三个有用节点的process�?/p>

8、在囑�Ş的Perform/Produce节点上点一下就可以修改它的属性，先来修改�W�一个。点一下第一个矩形节点（�W�一个Perform�Q�，在对话框里把process属性设�|��ؓ(f��)wi1:HashStringProcess�Q�注意：(x��)如果导入WSDL时改变了前缀�Q�这里就不是wi1�Q�，��Z��方便阅读�Q�把Name属性改为hashPerform。类似的�Q�第二个矩�Ş节点的process属性应该是wi2:CheckHashProcess�Q�Name则改为checkPerform�Q�对于唯一的Produce节点�Q�改名�ؓ(f��)produce。现在右边的囑֦�下所�C��?/p>

�? 改名后的process�?/p>

9、现在从Visual Editor切换到Properties��，在这里�ؓ(f��)myprocess定义输入和输出参数。它的输入应该是wi1:HashType和wi1:Str�Q�而输出应该是wi2:CheckHashResult�Q�也��是��_(d��)��对于我们�l�装出来的Web服务来说�Q�输入是�~�码�c�d��和待�~�码字符�Ԍ��而输出是验证�l�果�?/p>

10、上面我们定义了myprocess拥有的参敎ͼ�现在��p��用到它们了。切换回Visual Editor�Q�在�?w��i)型列表里选则�W�一个Perform�Q�hashPerform�Q�，把右边切换到Properties��，现在ToParameter属性里�q�是�I�白�Q�我们要把myprocess的输入映��到�q�个Perform�Q�所以按��d��按钮把两个输入参敎ͼ�wi1:HashType和wi1: Str�Q�加到ToParameter里。选中它们中的一个，可以看到双��有BindingType选项�Q�缺省�ؓ(f��)valueSource�q�一��，��q��它即可，在下面的FromPerform下拉框里只有一个选项TheParentPerform�Q�选中它。在最下面的FromParameter里选择和你选择的ToParameter��一��L(f��ng)��那个选项�Q�wi1:HashType->wi1:HashType�Q�wi1:Str->wi1:Str�Q��?/p>

�? 通过参数传递��生“数据流�?/p>

11、对于checkPerform�Q�它有三个输入参敎ͼ�我们希望HashType和hashPerform��h��同样的��|��所以它的设�|�和上一步里对HashType的设�|�一��P��OriginalString的设�|�和上一步的Str一��P��HashString属性是上一步得到的�l�果�Q�所以FromPerform属性应该是hashPerform�Q�FromParameter属性则是wi1:HashStringResult�?/p>

12、对produce的设�|�很��单，在ToParameter属性里加入我们要的�l�果wi2:CheckHashResult�Q�FromPerform选checkPerform�Q�FromParameter选wi2:CheckHashResult。现在，myprocess对应的process囑֦�下所�C��?/p>

�? 可以从图中看到服务的�l�构

13、对myprocess的设�|�到此就�l�束了，最困难的部分完成了�Q�剩下的工作都很��单和显而易见。选中mygrounding�Q�在它的hasAtomicProcessGrounding属性里加上wi1:HashStringAtomicProcessGrounding和wi2:CheckHashAtomicProcessGrounding�?/p>

14、现在myservice已经可以执行了（myprofile里还可以增加一些信息用来描�q�这个服务）。现在选中myservice�Q�按下执行按钮，在弹出的对话框里HashType框填MD5�Q�Str框填test�Q��Q意字�W�串都可以）�Q�然后按Execute按钮��׃��(x��)看到�l�果�Q�当�Ӟ��q�个服务不论你输入什么字�W�串都会(x��)得到true��|��原因不用我说了吧�?/p>

�? 执行�l�装后的服务

Timothy 2007-03-17 14:58 发表评论

Timothy — Wed, 29 Nov 2006 09:33:00 GMT

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Timothy 2006-11-29 17:33 发表评论