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| <document> |
| |
| <properties> |
| <title>Query Servlet</title> |
| <author email="Sean.Kelly@jpl.nasa.gov">Sean Kelly</author> |
| </properties> |
| |
| <body> |
| <section name="Query Servlet"> |
| |
| <p>The query servlet enables you to inject generic queries into |
| the OODT framework using HTTP. This enables you to query for |
| profiles and products without requiring a Java, RMI, or CORBA |
| enabled application. |
| </p> |
| </section> |
| |
| <section name="Requirements"> |
| |
| <p>The query servlet accepts various parameters for a query and |
| turns them into an <code>XMLQuery</code> object. It uses this |
| object internally to send the query around the network and to |
| gather results. It then returns a <code>text/xml</code> |
| representation of the <code>XMLQuery</code> object (for product |
| queries) or a <code>text/xml</code> representation of all matching |
| profiles (for profile queries). |
| </p> |
| |
| <p><strong>That means you must be able to process XML</strong> in |
| order to use the query servlet. Luckily, this isn't an onerous |
| restriction, as many languages are more than capable of doing so. |
| </p> |
| |
| <p>For more details, view the Javadocs for the |
| <code>jpl.oodt.servlets.QueryServlet</code> class.</p> |
| </section> |
| |
| <section name="Using the Query Servlet"> |
| |
| <p>In order to use the query servlet, you need to specify three parameters: |
| </p> |
| |
| <ol> |
| <li>You need to know the <strong>type of the query</strong> you |
| want to make. You will use a string value of |
| <code>profile</code> to make a profile query, and |
| <code>product</code> to make a product query. You specify |
| your choice in a parameter named <code>type</code>. |
| </li> |
| |
| <li>You need to know the <strong>name of the object</strong> |
| that should receive the query. This takes the form of |
| <code>urn:eda:<var>protocol</var>:<var>name</var></code> such |
| as <code>urn:eda:corba:PDS.Profile</code> or |
| <code>urn:eda:rmi:NCI-ImageServer</code>. You specify the |
| object name in a parameter named <code>object</code>. |
| </li> |
| |
| <li>You need <strong>the actual query</strong> you want to |
| send. You can express this in two ways: |
| |
| <ol> |
| <li>As an <strong>keyword query expression</strong> like |
| <code>TARGET_NAME = MARS</code>. You specify the |
| query expression in a parameter named |
| <code>keywordQuery</code>. |
| </li> |
| |
| <li>As a <strong>text serialized <code>XMLQuery</code> |
| object</strong>. You specify the XML document in a |
| parameter named <code>query</code>. |
| </li> |
| </ol> |
| |
| <p>Using the latter enables you to fully specify all sorts of |
| parameters in the query. The former, though, is far |
| easier to use. |
| </p> |
| |
| </li> |
| </ol> |
| |
| <p>You then URL encode parameters' values and make either an HTTP |
| <code>GET</code> or <code>POST</code> request to the query |
| servlet. If all goes according to plan, the servlet will execute |
| the query and return to you a <code>text/xml</code> document |
| describing the results. You can then manipulate that document as |
| you see fit. For profile queries, the return value is a |
| <code><profiles></code> document with zero or more matching |
| profiles. For product queries, it's a <code><query></code> |
| |
| document with the original <code>XMLQuery</code> object with any |
| product results in the <code><queryResults></code> section. |
| </p> |
| |
| </section> |
| |
| <section name="Query Examples"> |
| |
| <p>Let's look at a couple of concrete examples. In the first |
| example, we'll run a profile query against some planetary data |
| servers; the second example will run a product query for cancer |
| biomarkers. |
| </p> |
| |
| <subsection name="Planetary Profile Query"> |
| |
| <p>Suppose you wanted to know what PDS product servers supported |
| the query element <code>ONLINE_FILE_SPECIFICATION_NAME</code>. |
| You could pass that element to the PDS system profile server named |
| <code>urn:eda:rmi:PDS.System.Profile</code> using the query |
| servlet at |
| <code>http://starbrite.jpl.nasa.gov/servlet/jpl.oodt.servlets.QueryServlet</code>. |
| You can formulate the HTTP <code>GET</code> request in a URL as |
| follows: |
| </p> |
| |
| <p><code><a href="http://starbrite.jpl.nasa.gov/servlet/jpl.oodt.servlets.QueryServlet?object=urn:eda:rmi:PDS.System.Profile&type=profile&keywordQuery=ONLINE_FILE_SPECIFICATION_NAME+%3D+ANY">http://starbrite.jpl.nasa.gov/servlet/jpl.oodt.servlets.QueryServlet?<br/> object=urn:eda:rmi:PDS.System.Profile&<br/> type=profile&<br/> keywordQuery=ONLINE_FILE_SPECIFICATION_NAME+%3D+ANY</a></code></p> |
| |
| <p>Note that we've broken this URL into multiple lines for |
| readability. There should be no linebreaks in a real URL. Note |
| the following about this URL: |
| </p> |
| |
| <ul> |
| <li>The question-mark separates the request URI from its |
| parameters. |
| </li> |
| |
| <li>The parameters may come in any order.</li> |
| |
| <li>The <code>object</code> parameter names the target of the |
| query; in this case, the RMI product server named |
| <code>urn:eda:rmi:PDS.System.Profile</code>. |
| </li> |
| |
| <li>The <code>type</code> parameter specifies that we're doing a |
| <em>profile search</em>.</li> |
| |
| <li>The <code>keywordQuery</code> parameter identifies the query |
| expression. Note the URL encoding: the spaces become |
| <code>+</code> symbols, and the equals sign become |
| <code>%3D</code>. |
| </li> |
| </ul> |
| |
| <p>The response from such a query is an XML document; this XML |
| document describes matching profiles and may take a form such as |
| the following:</p> |
| |
| <source> |
| <?xml version="1.0" encoding="UTF-8"?> |
| <!DOCTYPE profiles PUBLIC "-//JPL//DTD OODT Profile 1.1//EN" |
| "http://starshine.jpl.nasa.gov:80/dtd/prof.dtd"> |
| |
| <profiles> |
| <profile> |
| <profAttributes> |
| <profId>1.3.6.1.4.1.1306.2.1.1.7</profId> |
| <profType>profile</profType> |
| <profStatusId>active</profStatusId> |
| </profAttributes> |
| <resAttributes> |
| <Identifier>PDS.ASU.Product</Identifier> |
| <Title> |
| PDS Arizona State University Data Node Product Server |
| </Title> |
| <Format>text/html</Format> |
| <resContext>NASA.PDS.ASU</resContext> |
| <resClass>system.productServer</resClass> |
| <resLocation> |
| http://starbrite.jpl.nasa.gov/servlet/ |
| jpl.oodt.servlets.ProductServlet?object=PDS.ASU.Product |
| </resLocation> |
| <resLocation>urn:eda:rmi:PDS.ASU.Product</resLocation> |
| </resAttributes> |
| <profElement> |
| <elemName>ONLINE_FILE_SPECIFICATION_NAME</elemName> |
| <elemType>CHARACTER</elemType> |
| <elemEnumFlag>T</elemEnumFlag> |
| <elemMaxOccurrence>0</elemMaxOccurrence> |
| </profElement> |
| <profElement> |
| <elemName>RETURN_TYPE</elemName> |
| <elemType>CHARACTER</elemType> |
| <elemEnumFlag>T</elemEnumFlag> |
| <elemValue>PDS_ZIP</elemValue> |
| <elemValue>PDS_LABEL</elemValue> |
| <elemValue>RAW</elemValue> |
| <elemMaxOccurrence>0</elemMaxOccurrence> |
| </profElement> |
| </profile> |
| |
| <profile> |
| <profAttributes> |
| <profId>1.3.6.1.4.1.1306.2.1.1.6</profId> |
| <profType>profile</profType> |
| <profStatusId>active</profStatusId> |
| </profAttributes> |
| <resAttributes> |
| <Identifier>PDS.RS.Product</Identifier> |
| <Title>PDS Radio Science Product Server</Title> |
| <Format>text/html</Format> |
| <resContext>NASA.PDS.RS</resContext> |
| <resClass>system.productServer</resClass> |
| <resLocation> |
| http://starbrite.jpl.nasa.gov/servlet/ |
| jpl.oodt.servlets.ProductServlet?object=PDS.RS.Product |
| </resLocation> |
| <resLocation>urn:eda:rmi:PDS.RS.Product</resLocation> |
| </resAttributes> |
| <profElement> |
| <elemName>ONLINE_FILE_SPECIFICATION_NAME</elemName> |
| <elemType>CHARACTER</elemType> |
| <elemEnumFlag>T</elemEnumFlag> |
| <elemMaxOccurrence>0</elemMaxOccurrence> |
| </profElement> |
| <profElement> |
| <elemName>RETURN_TYPE</elemName> |
| <elemType>CHARACTER</elemType> |
| <elemEnumFlag>T</elemEnumFlag> |
| <elemValue>PDS_ZIP</elemValue> |
| <elemValue>PDS_LABEL</elemValue> |
| <elemValue>RAW</elemValue> |
| <elemMaxOccurrence>0</elemMaxOccurrence> |
| </profElement> |
| </profile> |
| |
| <profile> |
| <profAttributes> |
| <profId>1.3.6.1.4.1.1306.2.1.1.4</profId> |
| <profType>profile</profType> |
| <profStatusId>active</profStatusId> |
| </profAttributes> |
| <resAttributes> |
| <Identifier>PDS.Atmos.Product</Identifier> |
| <Title>PDS Atmospheres Product Server</Title> |
| <Format>text/html</Format> |
| <resContext>NASA.PDS.Atmos</resContext> |
| <resClass>system.productServer</resClass> |
| <resLocation> |
| http://starbrite.jpl.nasa.gov/servlet/ |
| jpl.oodt.servlets.ProductServlet?object=PDS.Atmos.Product |
| </resLocation> |
| <resLocation>urn:eda:rmi:PDS.Atmos.Product</resLocation> |
| </resAttributes> |
| <profElement> |
| <elemName>ONLINE_FILE_SPECIFICATION_NAME</elemName> |
| <elemType>CHARACTER</elemType> |
| <elemEnumFlag>T</elemEnumFlag> |
| <elemMaxOccurrence>0</elemMaxOccurrence> |
| </profElement> |
| <profElement> |
| <elemName>RETURN_TYPE</elemName> |
| <elemType>CHARACTER</elemType> |
| <elemEnumFlag>T</elemEnumFlag> |
| <elemValue>PDS_ZIP</elemValue> |
| <elemValue>PDS_LABEL</elemValue> |
| <elemValue>RAW</elemValue> |
| <elemMaxOccurrence>0</elemMaxOccurrence> |
| </profElement> |
| </profile> |
| |
| <profile> |
| <profAttributes> |
| <profId>1.3.6.1.4.1.1306.2.1.1.3</profId> |
| <profType>profile</profType> |
| <profStatusId>active</profStatusId> |
| </profAttributes> |
| <resAttributes> |
| <Identifier>PDS.NAIF.Product</Identifier> |
| <Title>PDS NAIF Product Server</Title> |
| <Format>text/html</Format> |
| <resContext>NASA.PDS.NAIF</resContext> |
| <resClass>system.productServer</resClass> |
| <resLocation> |
| http://starbrite.jpl.nasa.gov/servlet/ |
| jpl.oodt.servlets.ProductServlet?object=PDS.NAIF.Product |
| </resLocation> |
| <resLocation>urn:eda:rmi:PDS.NAIF.Product</resLocation> |
| </resAttributes> |
| <profElement> |
| <elemName>ONLINE_FILE_SPECIFICATION_NAME</elemName> |
| <elemType>CHARACTER</elemType> |
| <elemEnumFlag>T</elemEnumFlag> |
| <elemMaxOccurrence>0</elemMaxOccurrence> |
| </profElement> |
| <profElement> |
| <elemName>RETURN_TYPE</elemName> |
| <elemType>CHARACTER</elemType> |
| <elemEnumFlag>T</elemEnumFlag> |
| <elemValue>PDS_ZIP</elemValue> |
| <elemValue>PDS_LABEL</elemValue> |
| <elemValue>RAW</elemValue> |
| <elemMaxOccurrence>0</elemMaxOccurrence> |
| </profElement> |
| </profile> |
| |
| <profile> |
| <profAttributes> |
| <profId>1.3.6.1.4.1.1306.2.1.1.2</profId> |
| <profType>profile</profType> |
| <profStatusId>active</profStatusId> |
| </profAttributes> |
| <resAttributes> |
| <Identifier>PDS.Geo.Product</Identifier> |
| <Title>PDS Geosciences Product Server</Title> |
| <Format>text/html</Format> |
| <resContext>NASA.PDS.GEO</resContext> |
| <resClass>system.productServer</resClass> |
| <resLocation> |
| http://starbrite.jpl.nasa.gov/servlet/ |
| jpl.oodt.servlets.ProductServlet?object=PDS.Geo.Product |
| </resLocation> |
| <resLocation>urn:eda:rmi:PDS.Geo.Product</resLocation> |
| </resAttributes> |
| <profElement> |
| <elemName>ONLINE_FILE_SPECIFICATION_NAME</elemName> |
| <elemType>CHARACTER</elemType> |
| <elemEnumFlag>T</elemEnumFlag> |
| <elemMaxOccurrence>0</elemMaxOccurrence> |
| </profElement> |
| <profElement> |
| <elemName>RETURN_TYPE</elemName> |
| <elemType>CHARACTER</elemType> |
| <elemEnumFlag>T</elemEnumFlag> |
| <elemValue>PDS_ZIP</elemValue> |
| <elemValue>PDS_LABEL</elemValue> |
| <elemValue>RAW</elemValue> |
| <elemMaxOccurrence>0</elemMaxOccurrence> |
| </profElement> |
| </profile> |
| |
| <profile> |
| <profAttributes> |
| <profId>1.3.6.1.4.1.1306.2.1.1.1</profId> |
| <profType>profile</profType> |
| <profStatusId>active</profStatusId> |
| </profAttributes> |
| <resAttributes> |
| <Identifier>PDS.CN.Product</Identifier> |
| <Title>PDS Central Node Archive Product Server</Title> |
| <Format>text/html</Format> |
| <resContext>NASA.PDS.CN</resContext> |
| <resClass>system.productServer</resClass> |
| <resLocation> |
| http://starbrite.jpl.nasa.gov/servlet/ |
| jpl.oodt.servlets.ProductServlet?object=PDS.CN.Product |
| </resLocation> |
| <resLocation>urn:eda:rmi:PDS.CN.Product</resLocation> |
| </resAttributes> |
| <profElement> |
| <elemName>ONLINE_FILE_SPECIFICATION_NAME</elemName> |
| <elemType>CHARACTER</elemType> |
| <elemEnumFlag>T</elemEnumFlag> |
| <elemMaxOccurrence>0</elemMaxOccurrence> |
| </profElement> |
| <profElement> |
| <elemName>RETURN_TYPE</elemName> |
| <elemType>CHARACTER</elemType> |
| <elemEnumFlag>T</elemEnumFlag> |
| <elemValue>PDS_ZIP</elemValue> |
| <elemValue>PDS_LABEL</elemValue> |
| <elemValue>RAW</elemValue> |
| <elemMaxOccurrence>0</elemMaxOccurrence> |
| </profElement> |
| </profile> |
| |
| <profile> |
| <profAttributes> |
| <profId>1.3.6.1.4.1.1306.2.1.1.10</profId> |
| <profType>profile</profType> |
| <profStatusId>active</profStatusId> |
| </profAttributes> |
| <resAttributes> |
| <Identifier>PDS.CN.Profile</Identifier> |
| <Title>PDS.CN.Profile</Title> |
| <Format>text/html</Format> |
| <resContext>NASA.PDS.CN</resContext> |
| <resClass>system.productServer</resClass> |
| <resLocation> |
| http://starbrite.jpl.nasa.gov/servlet/ |
| jpl.oodt.servlets.ProductServlet?object=PDS.CN.Profile |
| </resLocation> |
| <resLocation>urn:eda:rmi:PDS.CN.Profile</resLocation> |
| </resAttributes> |
| <profElement> |
| <elemName>ONLINE_FILE_SPECIFICATION_NAME</elemName> |
| <elemType>CHARACTER</elemType> |
| <elemEnumFlag>T</elemEnumFlag> |
| <elemMaxOccurrence>0</elemMaxOccurrence> |
| </profElement> |
| <profElement> |
| <elemName>RETURN_TYPE</elemName> |
| <elemType>CHARACTER</elemType> |
| <elemEnumFlag>T</elemEnumFlag> |
| <elemValue>PDS_ZIP</elemValue> |
| <elemValue>PDS_LABEL</elemValue> |
| <elemValue>RAW</elemValue> |
| <elemMaxOccurrence>0</elemMaxOccurrence> |
| </profElement> |
| </profile> |
| |
| <profile> |
| <profAttributes> |
| <profId>1.3.6.1.4.1.1306.2.1.1.9</profId> |
| <profType>profile</profType> |
| <profStatusId>active</profStatusId> |
| </profAttributes> |
| <resAttributes> |
| <Identifier>PDS.PPI.Product</Identifier> |
| <Title> |
| PDS Planetary Plasma Interactions Product Server |
| </Title> |
| <Format>text/html</Format> |
| <resContext>NASA.PDS.PPI</resContext> |
| <resClass>system.productServer</resClass> |
| <resLocation> |
| http://starbrite.jpl.nasa.gov/servlet/ |
| jpl.oodt.servlets.ProductServlet?object=PDS.PPI.Product |
| </resLocation> |
| <resLocation>urn:eda:rmi:PDS.PPI.Product</resLocation> |
| </resAttributes> |
| <profElement> |
| <elemName>ONLINE_FILE_SPECIFICATION_NAME</elemName> |
| <elemType>CHARACTER</elemType> |
| <elemEnumFlag>T</elemEnumFlag> |
| <elemMaxOccurrence>0</elemMaxOccurrence> |
| </profElement> |
| <profElement> |
| <elemName>RETURN_TYPE</elemName> |
| <elemType>CHARACTER</elemType> |
| <elemEnumFlag>T</elemEnumFlag> |
| <elemValue>PDS_ZIP</elemValue> |
| <elemValue>PDS_LABEL</elemValue> |
| <elemValue>RAW</elemValue> |
| <elemMaxOccurrence>0</elemMaxOccurrence> |
| </profElement> |
| </profile> |
| |
| <profile> |
| <profAttributes> |
| <profId>1.3.6.1.4.1.1306.2.1.1.8</profId> |
| <profType>profile</profType> |
| <profStatusId>active</profStatusId> |
| </profAttributes> |
| <resAttributes> |
| <Identifier>PDS.Img.Product</Identifier> |
| <Title>PDS Imaging Product Server</Title> |
| <Format>text/html</Format> |
| <resContext>NASA.PDS.Img</resContext> |
| <resClass>system.productServer</resClass> |
| <resLocation> |
| http://starbrite.jpl.nasa.gov/servlet/ |
| jpl.oodt.servlets.ProductServlet?object=PDS.Img.Product |
| </resLocation> |
| <resLocation>urn:eda:rmi:PDS.Img.Product</resLocation> |
| </resAttributes> |
| <profElement> |
| <elemName>ONLINE_FILE_SPECIFICATION_NAME</elemName> |
| <elemType>CHARACTER</elemType> |
| <elemEnumFlag>T</elemEnumFlag> |
| <elemMaxOccurrence>0</elemMaxOccurrence> |
| </profElement> |
| <profElement> |
| <elemName>RETURN_TYPE</elemName> |
| <elemType>CHARACTER</elemType> |
| <elemEnumFlag>T</elemEnumFlag> |
| <elemValue>PDS_ZIP</elemValue> |
| <elemValue>PDS_LABEL</elemValue> |
| <elemValue>RAW</elemValue> |
| <elemMaxOccurrence>0</elemMaxOccurrence> |
| </profElement> |
| </profile> |
| </profiles> |
| </source> |
| |
| </subsection> |
| |
| <subsection name="Biomarker Product Query"> |
| |
| <p>Suppose you had a query servlet available at |
| <code>http://pancreas/qs</code>, and you want to query the CORBA |
| product server <code>urn:eda:corba:TissueBank</code> with the |
| query expression <code>SeverityLevel = 3</code>. You can |
| formulate the entire <code>GET</code> request as the following |
| URL: |
| </p> |
| |
| <source> |
| http://pancreas/qs? |
| type=product& |
| object=urn:eda:corba:TissueBank& |
| keywordQuery=SeverityLevel+%3D+3 |
| </source> |
| |
| <p>(Again, we've broken the URL for readability.) The result to |
| this query could be an XML document like the following: |
| </p> |
| |
| <source> |
| <?xml version="1.0" encoding="UTF-8"?> |
| <!DOCTYPE query PUBLIC "-//JPL//DTD OODT Query 1.0//EN" |
| "http://pancreas/dtd/query.dtd"> |
| |
| <query> |
| <queryAttributes> |
| <queryId>UNKNOWN</queryId> |
| <queryTitle>UNKNOWN</queryTitle> |
| <queryDesc>UNKNOWN</queryDesc> |
| <queryType>QUERY</queryType> |
| <queryStatusId>ACTIVE</queryStatusId> |
| <querySecurityType>UNKNOWN</querySecurityType> |
| <queryRevisionNote> |
| 1999-12-12 JSH V1.0 Under Development |
| </queryRevisionNote> |
| <queryDataDictId>UNKNOWN</queryDataDictId> |
| </queryAttributes> |
| <queryResultModeId>ATTRIBUTE</queryResultModeId> |
| <queryPropogationType>BROADCAST</queryPropogationType> |
| <queryPropogationLevels>N/A</queryPropogationLevels> |
| <queryMimeAccept>*/*</queryMimeAccept> |
| <queryMaxResults>100</queryMaxResults> |
| <queryResults>0</queryResults> |
| <queryKWQString>SeverityLevel = 3</queryKWQString> |
| <querySelectSet> |
| <queryElement> |
| <tokenRole>LITERAL</tokenRole> |
| <tokenValue>3</tokenValue> |
| </queryElement> |
| <queryElement> |
| <tokenRole>elemName</tokenRole> |
| <tokenValue>SeverityLevel</tokenValue> |
| </queryElement> |
| <queryElement> |
| <tokenRole>RELOP</tokenRole> |
| <tokenValue>EQ</tokenValue> |
| </queryElement> |
| </querySelectSet> |
| <queryFromSet/> |
| <queryWhereSet/> |
| <queryResultSet> |
| <resultElement> |
| <resultId>1</resultId> |
| <resultMimeType>text/plain</resultMimeType> |
| <profId>TissueBank</profId> |
| <identifier/> |
| <resultHeader> |
| <headerElement> |
| <elemName>UNKNOWN</elemName> |
| <elemType>TEXT</elemType> |
| </headerElement> |
| </resultHeader> |
| <Resultvalue xml:space="preserve"> |
| PatientIDs=[1,2,4,7,11,19,22]</resultValue> |
| </resultElement> |
| </queryResultSet> |
| </query> |
| </source> |
| |
| <p>Instead of using the <code>keywordQuery</code> parameter, you |
| can create your own <code>XMLQuery</code> document and pass it in |
| as the <code>query</code> parameter instead. The query document |
| would look like this: |
| </p> |
| |
| <source> |
| <?xml version="1.0" encoding="UTF-8"?> |
| <!DOCTYPE query PUBLIC "-//JPL//DTD OODT Query 1.0//EN" |
| "http://pancreas:80/dtd/query.dtd"> |
| |
| <query> |
| <queryAttributes> |
| <queryId>expr1</queryId> |
| <queryTitle>Command-line Expression Query</queryTitle> |
| <queryDesc> |
| The expression for this query came from the command-line. |
| </queryDesc> |
| <queryType>QUERY</queryType> |
| <queryStatusId>ACTIVE</queryStatusId> |
| <querySecurityType>UNKNOWN</querySecurityType> |
| <queryRevisionNote> |
| 1999-12-12 JSH V1.0 Under Development |
| </queryRevisionNote> |
| <queryDataDictId>UNKNOWN</queryDataDictId> |
| </queryAttributes> |
| <queryResultModeId>ATTRIBUTE</queryResultModeId> |
| <queryPropogationType>BROADCAST</queryPropogationType> |
| <queryPropogationLevels>N/A</queryPropogationLevels> |
| <queryMimeAccept>*/*</queryMimeAccept> |
| <queryMaxResults>100</queryMaxResults> |
| <queryResults>0</queryResults> |
| <queryKWQString>SeverityLevel = 3</queryKWQString> |
| <querySelectSet/> |
| <queryFromSet/> |
| <queryWhereSet> |
| <queryElement> |
| <tokenRole>elemName</tokenRole> |
| <tokenValue>SeverityLevel</tokenValue> |
| </queryElement> |
| <queryElement> |
| <tokenRole>LITERAL</tokenRole> |
| <tokenValue>3</tokenValue> |
| </queryElement> |
| <queryElement> |
| <tokenRole>RELOP</tokenRole> |
| <tokenValue>EQ</tokenValue> |
| </queryElement> |
| </queryWhereSet> |
| <queryResultSet/> |
| </query> |
| </source> |
| |
| <p>Passing such a long string as a URL parameter in a |
| <code>GET</code> request can be tricky, though. For such long |
| parameters, it's better to use a <code>POST</code> request |
| instead. See your HTTP API documentation for details on |
| formulating <code>POST</code> requests. |
| </p> |
| </subsection> |
| </section> |
| </body> |
| </document> |
