什么是在户外的类型和方面？

问题描述

现在我开始使用alfresco。但我不清楚什么是类型和什么方面？请给出详细的例子。

Right now am started working with alfresco. But am not clear about what is type and whats aspect?. please give in detail with example.

推荐答案

创建的每个节点都有一个给定的类型，或文件夹。另一方面，一个节点可以具有许多方面，例如可标记的或/和可版本化。

Each node on creation has a given type, and just one type, like 'document' or 'folder'. On other hand one node can have many aspects, like 'taggable' or/and 'versionable'.

节点的节点类型可以随时间改变，但是对于一个节点只有一种类型，方面类似于属性附件，您可以在创建时添加它们，在运行时。

The node type of a node can change over time, but there is only one type for one node, the aspects are like property attachments, you can add them on creation or in runtime.

方面也可以添加到许多类型的节点，所以如果你想你的模型有一个特殊的属性将存在于许多类型，最好的方法是创建一个方面。

Aspects can be also added to many types of nodes, so if you want your model a have special property that will exist in many types, the best way is to create an aspect. Then to maintain your code you only have to maintain the aspect.

当然，您可以在Alfresco中创建自己的类型和方面，即自定义内容模型。

Of course you can create your own types and aspects in Alfresco, that is Customizing the content model.

以下是自定义内容模型的示例：

Here is an example of a custom content model:

i：status是一个自定义方面。 / em>

i:status is a custom aspect.

<?xml version="1.0" encoding="UTF-8"?>
    <model xmlns="http://www.alfresco.org/model/dictionary/1.0" name="i:multimediaModel">
      <description>Multimedia Model</description>
      <author>Pedro Costa</author>
      <version>1.0</version>
      <imports>
         <import uri="http://www.alfresco.org/model/dictionary/1.0" prefix="d"/>
         <import uri="http://www.alfresco.org/model/content/1.0" prefix="cm"/>
      </imports>
      <namespaces>
         <namespace uri="pt.i.model" prefix="i"/>
      </namespaces>
      <constraints>
      <constraint name="i:status_constraint" type="LIST">
       <parameter name="allowedValues">
        <list>
         <value>Draft</value>
         <value>Pending</value>
         <value>Current</value>
         <value>Archived</value>
        </list>
       </parameter>       
      </constraint>
      </constraints>
      <types>  
     <type name="i:multimedia">
      <title>Multimedia Metadata Model</title>
      <parent>cm:content</parent>
      <archive>true</archive>
      <properties>          
              <property name="i:insertDate">
                  <title>Multimedia insert date</title>
                     <description>
                     Multimedia insert date can be diferent of the 
                     insert date in alfresco, this apllies to multimedia 
                     created before database migration to alfresco
                     </description>
                     <type>d:datetime</type>
                     <mandatory>false</mandatory>
                 </property>
                 <property name="i:multimediaFormat">
        <title>Multimedia Format</title>
              <description>Multimedia Format, file type</description>
              <type>d:text</type>
              <mandatory>false</mandatory>
             </property>
             <property name="i:contentLength">
              <title>Content Length</title>
              <description>The file size in bytes</description>
              <type>d:long</type>
              <mandatory>false</mandatory>
             </property> 
             <property name="i:copyright">
              <title>Copyright</title>
              <description>Copyright</description>
              <type>d:text</type>
              <mandatory>false</mandatory>
             </property>
      </properties>
      <mandatory-aspects>
        <aspect>cm:taggable</aspect>
        <aspect>cm:auditable</aspect>
        <aspect>i:status</aspect>    
      </mandatory-aspects>
     </type>    
       </types>   
       <aspects>
      <aspect name="i:status">
       <title>Multimedia Status</title>
        <properties>
         <property name="i:status">
          <title>Status</title>
          <type>d:text</type>
          <default>Draft</default>
          <constraints>
           <constraint ref="i:status_constraint" />
          </constraints>     
         </property>    
        </properties>   
      </aspect>
       </aspects>   
    </model>

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