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| <h1 class="firstHeading">SMILA/Documentation/Feed Agent</h1> |
| <div id="bodyContent"> |
| <h3 id="siteSub">From Eclipsepedia</h3> |
| <div id="contentSub"><span class="subpages">< <a href="../../SMILA.html" title="SMILA">SMILA</a> | <a href="../Documentation.1.html" title="SMILA/Documentation">Documentation</a></span></div> |
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| <table id="toc" class="toc" summary="Contents"><tr><td><div id="toctitle"><h2>Contents</h2></div> |
| <ul> |
| <li class="toclevel-1"><a href="Feed_Agent.html#Overview"><span class="tocnumber">1</span> <span class="toctext">Overview</span></a></li> |
| <li class="toclevel-1"><a href="Feed_Agent.html#Agent_configuration"><span class="tocnumber">2</span> <span class="toctext">Agent configuration</span></a></li> |
| <li class="toclevel-1"><a href="Feed_Agent.html#Agent_configuration_explanation"><span class="tocnumber">3</span> <span class="toctext">Agent configuration explanation</span></a></li> |
| <li class="toclevel-1"><a href="Feed_Agent.html#Configuration_example"><span class="tocnumber">4</span> <span class="toctext">Configuration example</span></a></li> |
| <li class="toclevel-1"><a href="Feed_Agent.html#Output_example"><span class="tocnumber">5</span> <span class="toctext">Output example</span></a></li> |
| <li class="toclevel-1"><a href="Feed_Agent.html#See_also"><span class="tocnumber">6</span> <span class="toctext">See also</span></a></li> |
| </ul> |
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| <a name="Overview"></a><h2> <span class="mw-headline"> Overview </span></h2> |
| <p>The Feed agent offers the functionality to receive RSS and Atom feeds on a regular basis. The implementation uses <a href="http://rome.dev.java.net/" class="external text" title="http://rome.dev.java.net/" rel="nofollow">ROME</a> and <a href="http://wiki.java.net/bin/view/Javawsxml/RomeFetcher" class="external text" title="http://wiki.java.net/bin/view/Javawsxml/RomeFetcher" rel="nofollow">ROME Fetcher</a> to retrieve and parse the feeds. ROME supports the following feed formats: |
| </p> |
| <ul><li> RSS 0.90 |
| </li><li> RSS 0.91 Netscape |
| </li><li> RSS 0.91 Userland |
| </li><li> RSS 0.92 |
| </li><li> RSS 0.93 |
| </li><li> RSS 0.94 |
| </li><li> RSS 1.0 |
| </li><li> RSS 2.0 |
| </li><li> Atom 0.3 |
| </li><li> Atom 1.0. |
| </li></ul> |
| <a name="Agent_configuration"></a><h2> <span class="mw-headline"> Agent configuration </span></h2> |
| <p>The example configuration file is located at <tt>configuration/org.eclipse.smila.connectivity.framework/feeds.xml</tt>. |
| </p><p>Defining Schema: <tt>org.eclipse.smila.connectivits.framework.agent.feed/schemas/FeedDataSourceConnectionConfigSchema.xsd</tt>. |
| </p> |
| <a name="Agent_configuration_explanation"></a><h2> <span class="mw-headline"> Agent configuration explanation </span></h2> |
| <p>See <a href="Agent.html#Configuration" title="SMILA/Documentation/Agent">SMILA/Documentation/Agent#Configuration</a> for the generic parts of the configuration file. |
| </p><p>The root element of the configuration is <tt>DataSourceConnectionConfig</tt> and contains the following sub elements: |
| </p> |
| <ul><li> <tt>DataSourceID</tt> – the identification of a data source |
| </li><li> <tt>SchemaID</tt> – specifies the schema for the data source |
| </li><li> <tt>DataConnectionID</tt> – describes which agent or crawler should be used |
| <ul><li> <tt>Crawler</tt> – service ID a crawler |
| </li><li> <tt>Agent</tt> – service ID of an agent |
| </li></ul> |
| </li><li> <tt>CompoundHandling</tt> – specify if packed data (like a ZIP containing files) should be unpack and files within should be processed (YES or NO). |
| </li><li> <tt>Attributes</tt> – list all attributes provided by the data source |
| <ul><li> <tt>Attribute</tt> |
| <ul><li> attributes: |
| <ul><li> <tt>Type</tt> (required) – the data type (String, Integer or Date). |
| </li><li> <tt>Name</tt> (required) – attributes name. |
| </li><li> <tt>HashAttribute</tt> – specify if the attribute is used for the hash used for delta indexing (true or false). Must be true for at least one attribute which must always have a value. |
| </li><li> <tt>KeyAttribute</tt> – specify if the attribute is used for creating the record ID (true or false). Must be true for at least one attribute. All key attributes used together must identify the entry uniquely, so usually the FeedAttribute <i>Uri</i> will be used. |
| </li><li> <tt>Attachment</tt> – specify if the attribute return the data as attachment of record. |
| </li></ul> |
| </li><li> sub elements: |
| <ul><li> <tt>FeedAttributes</tt> content describes what to get from the feed entry. For allowed values see the table below. |
| </li></ul> |
| </li></ul> |
| </li></ul> |
| </li><li> <tt>Process</tt> – contains parameters for the agent business logic. |
| <ul><li> <tt>UpdateInterval</tt> – the number of seconds to wait before reloading the feeds specified by FeedUrl. |
| </li><li> <tt>FeedUrl</tt> – the URL of the news feed to load. You may specify multiple FeedUrls. |
| </li></ul> |
| </li></ul> |
| <p>Here is a description of the attributes that the Feed agent offers. It provides attributes about the feed itself (using prefix <tt>Feed</tt>) and attributes for entries of the feed. Some attributes do not return literals (string, date) but nested objects like <b>Person</b>, <b>Link</b>, etc. These objects are all MObjects that contain attributes themselves. The nested MObjects and their attributes (the attribute names are hard coded and cannot be configured) are described below. |
| Note that not all feeds necessarily provide values for all the attributes and that some values are provided that are not apperently part of the feed. |
| </p><p>These are the attributes of the feed: |
| </p> |
| <table class="wikitable" border="1"> |
| |
| <tr> |
| <th> Attribute |
| </th><th> Type |
| </th><th> Description |
| </th></tr> |
| <tr> |
| <td> FeedAuthors |
| </td><td> List<Person> |
| </td><td> Returns the feed authors |
| </td></tr> |
| <tr> |
| <td> FeedCategories |
| </td><td> List<Category> |
| </td><td> Returns the feed categories |
| </td></tr> |
| <tr> |
| <td> FeedContributors |
| </td><td> List<Person> |
| </td><td> Returns the feed contributors |
| </td></tr> |
| <tr> |
| <td> FeedCopyright |
| </td><td> String |
| </td><td> Returns the feed copyright information |
| </td></tr> |
| <tr> |
| <td> FeedDescription |
| </td><td> String |
| </td><td> Returns the feed description |
| </td></tr> |
| <tr> |
| <td> FeedEncoding |
| </td><td> String |
| </td><td> Returns the charset encoding of the feed |
| </td></tr> |
| <tr> |
| <td> FeedType |
| </td><td> String |
| </td><td> Returns the feed type |
| </td></tr> |
| <tr> |
| <td> FeedImage |
| </td><td> Image |
| </td><td> Returns the feed image |
| </td></tr> |
| <tr> |
| <td> FeedLanguage |
| </td><td> String |
| </td><td> Returns the feed language |
| </td></tr> |
| <tr> |
| <td> FeedLinks |
| </td><td> List<Link> |
| </td><td> Returns the feed links |
| </td></tr> |
| <tr> |
| <td> FeedPublishDate |
| </td><td> Date |
| </td><td> Returns the feed published date |
| </td></tr> |
| <tr> |
| <td> FeedTitle |
| </td><td> String |
| </td><td> Returns the feed title |
| </td></tr> |
| <tr> |
| <td> FeedUri |
| </td><td> String |
| </td><td> Returns the feed uri |
| </td></tr> |
| </table> |
| <p><br /> |
| And here are the attributes of feed entries: |
| </p> |
| <table class="wikitable" border="1"> |
| |
| <tr> |
| <th> Attribute |
| </th><th> Type |
| </th><th> Description |
| </th></tr> |
| <tr> |
| <td> Authors |
| </td><td> List<Person> |
| </td><td> Returns a feed entry authors |
| </td></tr> |
| <tr> |
| <td> Categories |
| </td><td> List<Category> |
| </td><td> Returns a feed entry categories |
| </td></tr> |
| <tr> |
| <td> Contents |
| </td><td> List<Content> |
| </td><td> Returns a feed entry contents |
| </td></tr> |
| <tr> |
| <td> Contributors |
| </td><td> List<Person> |
| </td><td> Returns a feed entry contributors |
| </td></tr> |
| <tr> |
| <td> Description |
| </td><td> Content |
| </td><td> Returns a feed entry description |
| </td></tr> |
| <tr> |
| <td> Enclosures |
| </td><td> List<Enclosure> |
| </td><td> Returns a feed entry enclosures |
| </td></tr> |
| <tr> |
| <td> Links |
| </td><td> List<Link> |
| </td><td> Returns a feed entry links |
| </td></tr> |
| <tr> |
| <td> PublishDate |
| </td><td> Date |
| </td><td> Returns a feed entry publish date |
| </td></tr> |
| <tr> |
| <td> Title |
| </td><td> String |
| </td><td> Returns a feed entry title |
| </td></tr> |
| <tr> |
| <td> Uri |
| </td><td> String |
| </td><td> Returns a feed entry uri. |
| </td></tr> |
| <tr> |
| <td> UpdateDate |
| </td><td> Date |
| </td><td> Returns a feed entry update date. |
| </td></tr> |
| </table> |
| <p>MObject <b>Person</b>: |
| </p> |
| <table class="wikitable" border="1"> |
| |
| <tr> |
| <th> Attribute |
| </th><th> Type |
| </th><th> Description |
| </th></tr> |
| <tr> |
| <td> Email |
| </td><td> String |
| </td><td> Returns the email of the person |
| </td></tr> |
| <tr> |
| <td> Name |
| </td><td> String |
| </td><td> Returns the name of the person |
| </td></tr> |
| <tr> |
| <td> Uri |
| </td><td> String |
| </td><td> Returns the uri of the person |
| </td></tr> |
| </table> |
| <p>MObject <b>Image</b>: |
| </p> |
| <table class="wikitable" border="1"> |
| |
| <tr> |
| <th> Attribute |
| </th><th> Type |
| </th><th> Description |
| </th></tr> |
| <tr> |
| <td> Link |
| </td><td> String |
| </td><td> Returns the link of the image |
| </td></tr> |
| <tr> |
| <td> Title |
| </td><td> String |
| </td><td> Returns the title of the image |
| </td></tr> |
| <tr> |
| <td> Url |
| </td><td> String |
| </td><td> Returns the url of the image |
| </td></tr> |
| <tr> |
| <td> Description |
| </td><td> String |
| </td><td> Returns the description of the image |
| </td></tr> |
| </table> |
| <p>MObject <b>Category</b>: |
| </p> |
| <table class="wikitable" border="1"> |
| |
| <tr> |
| <th> Attribute |
| </th><th> Type |
| </th><th> Description |
| </th></tr> |
| <tr> |
| <td> Name |
| </td><td> String |
| </td><td> Returns the name of the category |
| </td></tr> |
| <tr> |
| <td> TaxanomyUri |
| </td><td> String |
| </td><td> Returns the taxonomy uri of the category |
| </td></tr> |
| </table> |
| <p>MObject <b>Enclosure</b>: |
| </p> |
| <table class="wikitable" border="1"> |
| |
| <tr> |
| <th> Attribute |
| </th><th> Type |
| </th><th> Description |
| </th></tr> |
| <tr> |
| <td> Type |
| </td><td> String |
| </td><td> Returns the type of the enclosure |
| </td></tr> |
| <tr> |
| <td> Url |
| </td><td> String |
| </td><td> Returns the url of the enclosure |
| </td></tr> |
| <tr> |
| <td> Length |
| </td><td> Integer |
| </td><td> Returns the length of the enclosure |
| </td></tr> |
| </table> |
| <p>MObject <b>Link</b>: |
| </p> |
| <table class="wikitable" border="1"> |
| |
| <tr> |
| <th> Attribute |
| </th><th> Type |
| </th><th> Description |
| </th></tr> |
| <tr> |
| <td> Href |
| </td><td> String |
| </td><td> Returns the href of the link |
| </td></tr> |
| <tr> |
| <td> Hreflang |
| </td><td> String |
| </td><td> Returns the hreflang of the link |
| </td></tr> |
| <tr> |
| <td> Rel |
| </td><td> Integer |
| </td><td> Returns the rel of the link |
| </td></tr> |
| <tr> |
| <td> Title |
| </td><td> String |
| </td><td> Returns the title of the link |
| </td></tr> |
| <tr> |
| <td> Type |
| </td><td> String |
| </td><td> Returns the type of the link |
| </td></tr> |
| <tr> |
| <td> Length |
| </td><td> Integer |
| </td><td> Returns the length of the link |
| </td></tr> |
| </table> |
| <p>MObject <b>Content</b>: |
| </p> |
| <table class="wikitable" border="1"> |
| |
| <tr> |
| <th> Attribute |
| </th><th> Type |
| </th><th> Description |
| </th></tr> |
| <tr> |
| <td> Mode |
| </td><td> String |
| </td><td> Returns the mode of the content |
| </td></tr> |
| <tr> |
| <td> Value |
| </td><td> String |
| </td><td> Returns the value of the content |
| </td></tr> |
| <tr> |
| <td> Type |
| </td><td> String |
| </td><td> Returns the type of the content |
| </td></tr> |
| </table> |
| <a name="Configuration_example"></a><h2> <span class="mw-headline"> Configuration example </span></h2> |
| <div dir="ltr" style="text-align: left;"><pre class="source-xml"><span class="sc3"><span class="re1"><DataSourceConnectionConfig</span> |
| <span class="re0">xmlns:xsi</span>=<span class="st0">"http://www.w3.org/2001/XMLSchema-instance"</span> |
| <span class="re0">xsi:noNamespaceSchemaLocation</span>=<span class="st0">"../org.eclipse.smila.connectivity.framework.agent.feed/schemas/FeedDataSourceConnectionConfigSchema.xsd"</span> |
| <span class="re2">></span></span> |
| <span class="sc3"><span class="re1"><DataSourceID<span class="re2">></span></span></span>feeds<span class="sc3"><span class="re1"></DataSourceID<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><SchemaID<span class="re2">></span></span></span>org.eclipse.smila.connectivity.framework.agent.feed<span class="sc3"><span class="re1"></SchemaID<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><DataConnectionID<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Agent<span class="re2">></span></span></span>FeedAgent<span class="sc3"><span class="re1"></Agent<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"></DataConnectionID<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><CompoundHandling<span class="re2">></span></span></span>Yes<span class="sc3"><span class="re1"></CompoundHandling<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Attributes<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Attribute</span> <span class="re0">Type</span>=<span class="st0">"Date"</span> <span class="re0">Name</span>=<span class="st0">"PublishDate"</span> <span class="re0">HashAttribute</span>=<span class="st0">"true"</span><span class="re2">></span></span> |
| <span class="sc3"><span class="re1"><FeedAttributes<span class="re2">></span></span></span>PublishDate<span class="sc3"><span class="re1"></FeedAttributes<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"></Attribute<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Attribute</span> <span class="re0">Type</span>=<span class="st0">"Date"</span> <span class="re0">Name</span>=<span class="st0">"LastModifiedDate"</span> <span class="re0">HashAttribute</span>=<span class="st0">"true"</span><span class="re2">></span></span> |
| <span class="sc3"><span class="re1"><FeedAttributes<span class="re2">></span></span></span>UpdateDate<span class="sc3"><span class="re1"></FeedAttributes<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"></Attribute<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Attribute</span> <span class="re0">Type</span>=<span class="st0">"String"</span> <span class="re0">Name</span>=<span class="st0">"Uri"</span> <span class="re0">KeyAttribute</span>=<span class="st0">"true"</span><span class="re2">></span></span> |
| <span class="sc3"><span class="re1"><FeedAttributes<span class="re2">></span></span></span>Uri<span class="sc3"><span class="re1"></FeedAttributes<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"></Attribute<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Attribute</span> <span class="re0">Type</span>=<span class="st0">"String"</span> <span class="re0">Name</span>=<span class="st0">"Links"</span><span class="re2">></span></span> |
| <span class="sc3"><span class="re1"><FeedAttributes<span class="re2">></span></span></span>Links<span class="sc3"><span class="re1"></FeedAttributes<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"></Attribute<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Attribute</span> <span class="re0">Type</span>=<span class="st0">"MObject"</span> <span class="re0">Name</span>=<span class="st0">"Contents"</span><span class="re2">></span></span> |
| <span class="sc3"><span class="re1"><FeedAttributes<span class="re2">></span></span></span>Contents<span class="sc3"><span class="re1"></FeedAttributes<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"></Attribute<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Attribute</span> <span class="re0">Type</span>=<span class="st0">"String"</span> <span class="re0">Name</span>=<span class="st0">"Title"</span><span class="re2">></span></span> |
| <span class="sc3"><span class="re1"><FeedAttributes<span class="re2">></span></span></span>Title<span class="sc3"><span class="re1"></FeedAttributes<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"></Attribute<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Attribute</span> <span class="re0">Type</span>=<span class="st0">"MObject"</span> <span class="re0">Name</span>=<span class="st0">"Authors"</span><span class="re2">></span></span> |
| <span class="sc3"><span class="re1"><FeedAttributes<span class="re2">></span></span></span>Authors<span class="sc3"><span class="re1"></FeedAttributes<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"></Attribute<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"></Attributes<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Process<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><UpdateInterval<span class="re2">></span></span></span>300<span class="sc3"><span class="re1"></UpdateInterval<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><FeedUrl<span class="re2">></span></span></span>http://dev.eclipse.org/newslists/news.eclipse.rt.smila/maillist.rss<span class="sc3"><span class="re1"></FeedUrl<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><FeedUrl<span class="re2">></span></span></span>http://search.twitter.com/search.atom?q=smila<span class="sc3"><span class="re1"></FeedUrl<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"></Process<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"></DataSourceConnectionConfig<span class="re2">></span></span></span></pre></div> |
| <a name="Output_example"></a><h2> <span class="mw-headline"> Output example </span></h2> |
| <p>A record created by the Feed agent using the default configuration may have the following or a similar structure: |
| </p> |
| <div dir="ltr" style="text-align: left;"><pre class="source-xml"><span class="sc3"><span class="re1"><Record</span> <span class="re0">xmlns</span>=<span class="st0">"http://www.eclipse.org/smila/record"</span> <span class="re0">version</span>=<span class="st0">"1.0"</span><span class="re2">></span></span> |
| <span class="sc3"><span class="re1"><Val</span> <span class="re0">key</span>=<span class="st0">"_recordid"</span><span class="re2">></span></span>feed:<span class="sc1">&lt;</span>Url=http://dev.eclipse.org/mhonarc/newsLists/news.eclipse.rt.smila/msg00022.html<span class="sc3"><span class="re1"></Val<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Val</span> <span class="re0">key</span>=<span class="st0">"_source"</span><span class="re2">></span></span>feed<span class="sc3"><span class="re1"></Val<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Val</span> <span class="re0">key</span>=<span class="st0">"PublishDate"</span><span class="re2">></span></span> type="datetime">2009-04-30T13:28:34+0100<span class="sc3"><span class="re1"></Val<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Val</span> <span class="re0">key</span>=<span class="st0">"Url"</span><span class="re2">></span></span>http://dev.eclipse.org/mhonarc/newsLists/news.eclipse.rt.smila/msg00022.html<span class="sc3"><span class="re1"></Val<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Val</span> <span class="re0">key</span>=<span class="st0">"MimeType"</span><span class="re2">></span></span>text/html<span class="sc3"><span class="re1"></Val<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Val</span> <span class="re0">key</span>=<span class="st0">"Title"</span><span class="re2">></span></span>[news.eclipse.rt.smila] Re: Semantic Software Engineering<span class="sc3"><span class="re1"></Val<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Seq</span> <span class="re0">key</span>=<span class="st0">"Contents"</span><span class="re2">></span></span> |
| <span class="sc3"><span class="re1"><Map<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Val</span> <span class="re0">key</span>=<span class="st0">"Value"</span><span class="re2">></span></span>Hi J<span class="sc1">&#xFC;</span>rgen, The idea is to support companies and projects that rely on semantic technologies (especially in RDF or OWL) with a set of plugins that they can reuse for their tooling. The first thing would be support for loading an ontology, searching for conc...<span class="sc3"><span class="re1"></Val<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Val</span> <span class="re0">key</span>=<span class="st0">"Type"</span><span class="re2">></span></span>text/html<span class="sc3"><span class="re1"></Val<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"></Map<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"></Seq<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Seq</span> <span class="re0">key</span>=<span class="st0">"Authors"</span><span class="re2">></span></span> |
| <span class="sc3"><span class="re1"><Map<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"><Val</span> <span class="re0">key</span>=<span class="st0">"Name"</span><span class="re2">></span></span>lautenbacher@xxxxxxx (Florian Lautenbacher)<span class="sc3"><span class="re1"></Val<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"></Map<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"></Seq<span class="re2">></span></span></span> |
| <span class="sc3"><span class="re1"></Record<span class="re2">></span></span></span></pre></div> |
| <a name="See_also"></a><h2> <span class="mw-headline"> See also </span></h2> |
| <ul><li> <a href="Agent.html" title="SMILA/Documentation/Agent">Agent</a> |
| </li><li> <a href="Mock_Agent.html" title="SMILA/Documentation/Mock Agent">Mock Agent</a> |
| </li></ul> |
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