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<p class="tableOfContents"><strong>Table of Contents: <a href="/pubs/techbull/mj14/mj14_issue_cover.html">2014 MAY–JUNE No. 398</a></strong></p>
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<span class="previous"><a href="mj14_mesh_on_demand.html">Previous</a></span> <span class="next"><a href="mj14_nlm_classification_2014.html">Next</a></span>
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<hr class="hr1" />
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<h1 class="articleH1">Updates to MedlinePlus Connect Web Service Formats</h1>
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<p class="tbyearmonth">Robison R. Updates to MedlinePlus Connect Web Service Formats. NLM Tech Bull. 2014 May-Jun;(398):e3.</p>
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<div class="articleactions">2014 May 05 <span class="status">[posted]</span>
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<div class="articleParagraph">
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<p>
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The National Library of Medicine announces several changes in the format of the MedlinePlus Connect Web service. <a href="//www.nlm.nih.gov/medlineplus/connect/overview.html">MedlinePlus Connect</a> facilitates the linking of patient portals and electronic health record (EHR) systems to <a href="//www.nlm.nih.gov/medlineplus/">MedlinePlus</a>, an authoritative, up-to-date health information resource for patients, families, and health care providers.
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</p>
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<p>
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MedlinePlus Connect conforms to the HL7 Version 3 standard for how these links are structured and function. Specifically, both the MedlinePlus Connect <a href="//www.nlm.nih.gov/medlineplus/connect/application.html">Web application</a> and <a href="//www.nlm.nih.gov/medlineplus/connect/service.html">Web service</a> accept URL-based queries in the format specified by the <a href="//www.hl7.org/implement/standards/product_brief.cfm?product_id=22">Implementation Guide for URL-Based Implementations of the Context-aware Knowledge Retrieval (Infobutton) Domain</a>. Furthermore, the responses of the MedlinePlus Connect Web service follow the <a href="//www.hl7.org/implement/standards/product_brief.cfm?product_id=283">Implementation Guide for Service-Oriented Architecture Implementations of the Context-aware Knowledge Retrieval (Infobutton) Domain</a>.
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</p>
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<p>
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Changes in this latter specification required that we make corresponding changes in the Web service responses. These changes are:
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</p>
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<ul>
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<li><strong>Enabled two new formats for the Web service, JSON and JSONP</strong>. These options are in addition to the XML format. Users can choose the response format by including the <strong>knowledgeResponseType</strong> parameter in their URL-based query. If this parameter is not used, the default response format is XML. These formats were enabled in December 2013.
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</li>
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<li><strong>Small changes to certain Atom:feed node elements in our XML output</strong>. Specifically, the <em>Atom:feed</em> node no longer contains a reference to the v3 namespace, the <em>Atom:feed:updated</em> node no longer has the attribute "type=text", and the <em>Atom:feed:category</em> nodes have been simplified. These changes were enacted in April 2014. Note that the <em>Atom:entry</em> elements that contain the MedlinePlus and GHR content were unchanged.
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<p>
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Visit the <a href="//apps2.nlm.nih.gov/medlineplus/services/servicedemo.cfm">Web Service Demonstration page</a> to see samples of the different Web service formats (see <a href="#fig1">Figure 1</a>).
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<a name="fig1"></a>
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<div class="figure" style="width: 802px;"> <img src="graphics/mplus_fig1.png" alt="Screen capture of the MedlinePlus Connect Web Service Demonstration homepage." title="Screen capture of the MedlinePlus Connect Web Service Demonstration homepage" width="802" height="492" /><br /> <strong>Figure 1. The MedlinePlus Connect Web Service Demonstration homepage.</strong></div>
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<p>
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More information about the MedlinePlus Connect Web service can be found in the <a href="//www.nlm.nih.gov/medlineplus/connect/service.html">documentation</a>. Additional information about HL7 standards can be found at <a href="//www.hl7.org/">www.hl7.org</a>.
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<p class="articleParagraph">
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By
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Rex Robison<br />
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Reference and Web Services<br />
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<strong>Last updated:</strong> 05 May 2014</p>
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