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<!-- ************************* MeSH Content Begin ************************* -->
<h1>ASCII MeSH Conversion to XML MeSH</h1>
<p>This page includes a table of data elements in ASCII MeSH, with the corresponding elements and attributes in XML MeSH. See table 2, below. Note, however,&nbsp; that in some of the corresponding data elements the XML structure is more fine-grained, and a number&nbsp;of data elements in XML have no corresponding data in ASCII MeSH at all. See table 1.</p>
<h3>1. Data in XML MeSH for which there is no corresponding data element in ASCII MeSH</h3>
<!-- full path /mesh/2014/download -->
<p>See also the <a href="/mesh/xml_data_elements.html">list of all XML MeSH Data elements</a> which has descriptions and examples.</p>
<p>Record types:</p>
<p>D = Descriptor<br />Q = Qualifier<br />SCR = Supplemental Concept (formerly Chemical) Record</p>
<table class="usa-table">
<tbody>
<tr>
<td>
<p><strong>XML MeSH Element or Attribute</strong></p>
</td>
<td>
<p><strong>Record<br />Type</strong></p>
</td>
</tr>
<tr>
<td>
<p>&lt;ActiveMeSHYearList&gt;</p>
</td>
<td>
<p>D, Q, SCR</p>
</td>
</tr>
<tr>
<td>
<p>&lt;Concept&gt;</p>
</td>
<td>
<p>D, Q, SCR</p>
</td>
</tr>
<tr>
<td>
<p>ConceptPreferredTermYN [attribute of &lt;Term&gt;]</p>
</td>
<td>
<p>D, Q, SCR</p>
</td>
</tr>
<tr>
<td>
<p>&lt;ConceptRelation&gt;</p>
</td>
<td>
<p>D, Q, SCR</p>
</td>
</tr>
<tr>
<td>
<p>&lt;Concept1UI&gt;</p>
</td>
<td>
<p>D, Q, SCR</p>
</td>
</tr>
<tr>
<td>
<p>&lt;Concept2UI&gt;</p>
</td>
<td>
<p>D, Q, SCR</p>
</td>
</tr>
<tr>
<td>
<p>&lt;ConceptUI&gt;</p>
</td>
<td>
<p>D, Q, SCR</p>
</td>
</tr>
<tr>
<td>
<p>PreferredConceptYN [attribute of &lt;Concept&gt;]</p>
</td>
<td>
<p>D, Q, SCR</p>
</td>
</tr>
<tr>
<td>
<p>&lt;RecordOriginator&gt;</p>
</td>
<td>
<p>D, Q, SCR</p>
</td>
</tr>
<tr>
<td>
<p>&lt;RecordAuthorizer&gt;</p>
</td>
<td>
<p>D, Q, SCR</p>
</td>
</tr>
<tr>
<td>
<p>&lt;RecordMaintainer&gt;</p>
</td>
<td>
<p>D, Q, SCR</p>
</td>
</tr>
<tr>
<td>
<p>&lt;RelationAttribute&gt;</p>
</td>
<td>
<p>D ,Q, SCR</p>
</td>
</tr>
<tr>
<td>
<p>&lt;SemanticTypeName&gt;</p>
</td>
<td>
<p>D, Q, SCR</p>
</td>
</tr>
<tr>
<td>
<p>&lt;TermUI&gt;</p>
</td>
<td>
<p>D, Q, SCR</p>
</td>
</tr>
</tbody>
</table>
<h3>2. Data elements in ASCII MeSH, with the corresponding elements in XML MeSH</h3>
<!-- full path /mesh/2014/download; two links -->
<p>The table below lists data elements in ASCII MeSH with the corresponding element in XML MeSH. Note that in some cases the correspondence is not simply one-to-one. For example, in the case of terms, the conversion also involves setting XML attribute values. These are indicated in the table with the word "And". In other cases, the conversion holds only under certain data conditions, indicated in the table by the word "Where". See also the <a href="/mesh/xml_data_elements.html">list of all XML MeSH Data elements</a> and the lists of ASCII MeSH data elements via links listed under "Data Elements in MeSH records" on the <a href="/mesh/introduction.html">Introduction to MeSH</a> page.</p>
<table class="usa-table">
<tbody>
<tr>
<td>
<p><strong>ASCII MeSH element</strong></p>
</td>
<td>
<p><strong>Element Name</strong></p>
</td>
<td>
<p><strong>Record<br />Type</strong></p>
</td>
<td>
<p><strong>XML element Tag<br />or attribute</strong></p>
</td>
</tr>
<tr>
<td>
<p>AN</p>
</td>
<td>
<p>Annotation</p>
</td>
<td>
<p>D, Q</p>
</td>
<td>
<p>&lt;Annotation&gt;</p>
</td>
</tr>
<tr>
<td>
<p>AQ</p>
</td>
<td>
<p>Allowable<br />Qualifier</p>
</td>
<td>
<p>D</p>
</td>
<td>
<p>&lt;AllowableQualifier&gt;</p>
<p>See also &lt;Abbreviation&gt;.</p>
</td>
</tr>
<tr>
<td>
<p>CATSH</p>
</td>
<td>
<p>Cataloging<br />Subheadings</p>
</td>
<td>
<p>D</p>
</td>
<td>
<p>not in XML</p>
</td>
</tr>
<tr>
<td>
<p>CX</p>
</td>
<td>
<p>Consider Also XREF</p>
</td>
<td>
<p>D</p>
</td>
<td>
<p>&lt;ConsiderAlso&gt;</p>
</td>
</tr>
<tr>
<td>
<p>DA</p>
</td>
<td>
<p>Date of Entry</p>
</td>
<td>
<p>D, Q, SCR</p>
</td>
<td>
<p>&lt;DateCreated&gt;, &lt;Year&gt;, &lt;Month&gt;, &lt;Day&gt;</p>
</td>
</tr>
<tr>
<td>
<p>DC</p>
</td>
<td>
<p>Descriptor Class</p>
</td>
<td>
<p>D</p>
</td>
<td>
<p>DescriptorClass [attribute of &lt;DescriptorRecord&gt;]</p>
</td>
</tr>
<tr>
<td>
<p>DE</p>
</td>
<td>
<p>Descriptor Entry Version</p>
</td>
<td>
<p>D</p>
</td>
<td>
<p>&lt;EntryVersion&gt;</p>
</td>
</tr>
<tr>
<td>
<p>DQ</p>
</td>
<td>
<p>Date Qualifier Established</p>
</td>
<td>
<p>Q</p>
</td>
<td>
<p>&lt;DateEstablished&gt;, (&lt;Year&gt;, &lt;Month&gt;, &lt;Day&gt;)</p>
</td>
</tr>
<tr>
<td>
<p>DS</p>
</td>
<td>
<p>Descriptor Sort Version</p>
</td>
<td>
<p>D</p>
</td>
<td>
<p>&lt;SortVersion&gt;</p>
</td>
</tr>
<tr>
<td>
<p>DX</p>
</td>
<td>
<p>Date Descriptor Established</p>
</td>
<td>
<p>D</p>
</td>
<td>
<p>&lt;DateEstablished&gt; (&lt;Year&gt;, &lt;Month&gt;, &lt;Day&gt;)</p>
</td>
</tr>
<tr>
<td>
<p>EC</p>
</td>
<td>
<p>Entry Combination</p>
</td>
<td>
<p>D</p>
</td>
<td>
<p>&lt;EntryCombination&gt;</p>
</td>
</tr>
<tr>
<td>
<p>&nbsp;&nbsp;&nbsp;subelement [1]</p>
</td>
<td>
<p>[Qualifier input]</p>
</td>
<td>D</td>
<td>&lt;ECIn&gt;</td>
</tr>
<tr>
<td>&nbsp;&nbsp;&nbsp;subelement [2]<br />&nbsp;&nbsp;&nbsp;subelement [3; opt]</td>
<td>
<p>MH output<br />[Qualifier output; optional]</p>
</td>
<td>D</td>
<td>&lt;ECOut&gt;</td>
</tr>
<tr>
<td>
<p>ENTRY [term]</p>
</td>
<td>
<p>Entry Term,<br />Non-Print</p>
</td>
<td>
<p>D</p>
</td>
<td>
<p>&lt;Term&gt;</p>
</td>
</tr>
<tr>
<td>
<p>PRINT ENTRY [term]</p>
</td>
<td>
<p>Entry Term,<br />Print</p>
</td>
<td>
<p>D</p>
</td>
<td>
<p>&lt;Term&gt;</p>
</td>
</tr>
<tr>
<td>&nbsp;[term subelements]</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
</tr>
<tr>
<td>
<p>&nbsp;&nbsp;&nbsp;b. subelement</p>
</td>
<td>
<p>Semantic Type</p>
</td>
<td>
<p>D, SCR</p>
</td>
<td>
<p>&lt;SemanticType&gt;</p>
</td>
</tr>
<tr>
<td>
<p>&nbsp;&nbsp;&nbsp;c. subelement</p>
</td>
<td>
<p>Lexical Type</p>
</td>
<td>
<p>D, SCR</p>
</td>
<td>
<p>LexicalTag [attribute of &lt;Term&gt;]</p>
</td>
</tr>
<tr>
<td>
<p>&nbsp;&nbsp;&nbsp;d. subelement</p>
</td>
<td>
<p>Semantic Relation</p>
</td>
<td>
<p>D, SCR</p>
</td>
<td>
<p>&lt;ConceptRelation&gt;, RelationName</p>
</td>
</tr>
<tr>
<td>
<p>&nbsp;&nbsp;&nbsp;e. subelement</p>
</td>
<td>
<p>Thesaurus ID</p>
</td>
<td>
<p>D, SCR</p>
</td>
<td>
<p>&lt;ThesaurusID&gt;</p>
</td>
</tr>
<tr>
<td>
<p>&nbsp;&nbsp;&nbsp;f. subelement</p>
</td>
<td>
<p>Date</p>
</td>
<td>
<p>D, SCR</p>
</td>
<td>
<p>&lt;DateCreated&gt;, &lt;Year&gt;, &lt;Month&gt;, &lt;Day&gt;</p>
</td>
</tr>
<tr>
<td>
<p>&nbsp;&nbsp;&nbsp;s. subelement</p>
</td>
<td>
<p>Sort Version</p>
</td>
<td>
<p>D, SCR</p>
</td>
<td>
<p>&lt;SortVersion&gt;</p>
</td>
</tr>
<tr>
<td>
<p>&nbsp;&nbsp;&nbsp;v. subelement</p>
</td>
<td>
<p>Entry Version</p>
</td>
<td>
<p>D, SCR</p>
</td>
<td>
<p>&lt;EntryVersion&gt;</p>
</td>
</tr>
<tr>
<td>
<p>FR</p>
</td>
<td>
<p>Frequency</p>
</td>
<td>
<p>SCR</p>
</td>
<td>
<p>&lt;Frequency&gt;</p>
</td>
</tr>
<tr>
<td>
<p>FX</p>
</td>
<td>
<p>Forward Cross Reference</p>
</td>
<td>
<p>D</p>
</td>
<td>
<p>&lt;SeeRelatedDescriptor&gt;</p>
</td>
</tr>
<tr>
<td>
<p>HM</p>
</td>
<td>
<p>Heading Mapped-To</p>
</td>
<td>
<p>SCR</p>
</td>
<td>
<p>&lt;HeadingMappedTo&gt;</p>
</td>
</tr>
<tr>
<td>
<p>HN</p>
</td>
<td>
<p>History Note</p>
</td>
<td>
<p>D, Q</p>
</td>
<td>
<p>&lt;HistoryNote&gt;</p>
</td>
</tr>
<tr>
<td>
<p>II</p>
</td>
<td>
<p>Indexing Information</p>
</td>
<td>
<p>SCR</p>
</td>
<td>
<p>&lt;IndexingInformation&gt;</p>
</td>
</tr>
<tr>
<td>
<p>MH</p>
</td>
<td>
<p>MeSH Heading</p>
</td>
<td>
<p>D</p>
</td>
<td>
<p>&lt;Term&gt;<br /><br />[And &lt;Term&gt; attributes:]<br />IsPermutedTermYN="N" [AND] RecordPreferredTermYN="Y" [AND]<br />PrintFlagYN="Y" [AND]<br />ConceptPreferredTermYN="Y"<br /><br />See also &lt;String&gt;, &lt;ConceptName&gt;, &lt;DescriptorName&gt;</p>
</td>
</tr>
<tr>
<td>
<p>MH_TH</p>
</td>
<td>
<p>MeSH Heading Thesaurus ID</p>
</td>
<td>
<p>D</p>
</td>
<td>
<p>&lt;ThesaurusID&gt;<br /><br />[where &lt;Term&gt; attributes are:]<br />IsPermutedTermYN="N" [AND] RecordPreferredTermYN="Y" [AND]<br />PrintFlagYN="Y" [AND]<br />ConceptPreferredTermYN="Y"</p>
</td>
</tr>
<tr>
<td>
<p>MN</p>
</td>
<td>
<p>MeSH Tree Number</p>
</td>
<td>
<p>D,Q</p>
</td>
<td>
<p>&lt;TreeNumber&gt;</p>
</td>
</tr>
<tr>
<td>
<p>MR</p>
</td>
<td>
<p>Major Revision Date</p>
</td>
<td>
<p>D, Q, SCR</p>
</td>
<td>
<p>&lt;DateRevised&gt; (&lt;Year&gt;, &lt;Month&gt;, &lt;Day&gt;)</p>
</td>
</tr>
<tr>
<td>
<p>MS</p>
</td>
<td>
<p>MeSH Scope Note</p>
</td>
<td>
<p>D,Q</p>
</td>
<td>
<p>&lt;ScopeNote&gt;</p>
</td>
</tr>
<tr>
<td>
<p>N1</p>
</td>
<td>
<p>CAS TYPE 1 NAME</p>
</td>
<td>
<p>D, SCR</p>
</td>
<td>
<p>&lt;CASN1Name&gt;</p>
</td>
</tr>
<tr>
<td>
<p>NM</p>
</td>
<td>
<p>Name of Substance</p>
</td>
<td>
<p>SCR</p>
</td>
<td>
<p>&lt;Term&gt;<br /><br />[And &lt;Term&gt; attributes:]<br />IsPermutedTermYN="N" [AND] RecordPreferredTermYN="Y" [AND]<br />PrintFlagYN="Y" [AND]<br />ConceptPreferredTermYN="Y"<br /><br />See also &lt;String&gt;, &lt;ConceptName&gt; ,&lt;SupplementalRecordName&gt;</p>
</td>
</tr>
<tr>
<td>
<p>NM_TH</p>
</td>
<td>
<p>NM Thesaurus ID</p>
</td>
<td>
<p>SCR</p>
</td>
<td>
<p>&lt;ThesaurusID&gt;<br /><br />[where &lt;Term&gt; attributes are:]<br />IsPermutedTermYN="N" [AND] RecordPreferredTermYN="Y" [AND]<br />PrintFlagYN="Y" [AND]<br />ConceptPreferredTermYN="Y"</p>
</td>
</tr>
<tr>
<td>
<p>NO</p>
</td>
<td>
<p>Note</p>
</td>
<td>
<p>Q, SCR</p>
</td>
<td>
<p>&lt;Note&gt;</p>
</td>
</tr>
<tr>
<td>
<p>OL</p>
</td>
<td>
<p>Online Note</p>
</td>
<td>
<p>D, Q</p>
</td>
<td>
<p>&lt;OnlineNote&gt;</p>
</td>
</tr>
<tr>
<td>
<p>PA</p>
</td>
<td>
<p>Pharmacological Action</p>
</td>
<td>
<p>D, SCR</p>
</td>
<td>
<p>&lt;PharmacologicalAction&gt;</p>
</td>
</tr>
<tr>
<td>
<p>PI</p>
</td>
<td>
<p>Previous Indexing</p>
</td>
<td>
<p>D, SCR</p>
</td>
<td>
<p>&lt;PreviousIndexing&gt;</p>
</td>
</tr>
<tr>
<td>
<p>PM</p>
</td>
<td>
<p>Public MeSH Note</p>
</td>
<td>
<p>D</p>
</td>
<td>
<p>&lt;PublicMeSHNote&gt;</p>
</td>
</tr>
<tr>
<td>
<p>QA</p>
</td>
<td>
<p>Topical Qualifier Abbreviation</p>
</td>
<td>
<p>Q</p>
</td>
<td>
<p>&lt;Abbreviation&gt;</p>
</td>
</tr>
<tr>
<td>
<p>QE</p>
</td>
<td>
<p>Qualifier Entry Version</p>
</td>
<td>
<p>Q</p>
</td>
<td>
<p>&lt;EntryVersion&gt;</p>
</td>
</tr>
<tr>
<td>
<p>QS</p>
</td>
<td>
<p>Qualifier Sort Version</p>
</td>
<td>
<p>Q</p>
</td>
<td>
<p>&lt;SortVersion&gt;</p>
</td>
</tr>
<tr>
<td>
<p>QT</p>
</td>
<td>
<p>Qualifier Type</p>
</td>
<td>
<p>Q</p>
</td>
<td>
<p>QualifierType [Attribute of &lt;QualifierRecord&gt;]</p>
</td>
</tr>
<tr>
<td>
<p>QX</p>
</td>
<td>
<p>Qualifier Cross Reference</p>
</td>
<td>
<p>Q</p>
</td>
<td>
<p>&lt;Term&gt;<br /><br />[And &lt;Term&gt; attributes:]<br />RecordPreferredTermYN="N" [AND]<br />PrintFlagYN="Y" [AND]<br />IsPermutedTermYN="N"<br /><br />See also &lt;String&gt;, &lt;ConceptName&gt;</p>
</td>
</tr>
<tr>
<td>
<p>RECTYPE</p>
</td>
<td>
<p>Record Type</p>
</td>
<td>
<p>D, Q, SCR</p>
</td>
<td>
<p>See<br />&lt;DescriptorRecord&gt;,<br />&lt;SupplementalRecord&gt;,<br />&lt;QualifierRecord&gt;</p>
</td>
</tr>
<tr>
<td>
<p>RH</p>
</td>
<td>
<p>Running Head</p>
</td>
<td>
<p>D</p>
</td>
<td>
<p>&lt;RunningHead&gt;</p>
</td>
</tr>
<tr>
<td>
<p>RN</p>
</td>
<td>
<p>CAS REGISTRY/<br />EC NUMBER/<br />UNII CODE</p>
</td>
<td>
<p>D, SCR</p>
</td>
<td>
<p>&lt;RegistryNumber&gt;</p>
</td>
</tr>
<tr>
<td>
<p>RR</p>
</td>
<td>
<p>Related Registry Number</p>
</td>
<td>
<p>D, SCR</p>
</td>
<td>
<p>&lt;RelatedRegistryNumber&gt;</p>
</td>
</tr>
<tr>
<td>
<p>SH</p>
</td>
<td>
<p>Subheading</p>
</td>
<td>
<p>Q</p>
</td>
<td>
<p>&lt;Term&gt;<br /><br />[And &lt;Term&gt; attributes:]<br />IsPermutedTermYN="N" [AND] RecordPreferredTermYN="Y" [AND]<br />PrintFlagYN="Y" [AND]<br />ConceptPreferredTermYN="Y"<br /><br />See also &lt;String&gt;, &lt;ConceptName&gt;, &lt;QualifierName&gt;</p>
</td>
</tr>
<tr>
<td>
<p>SO</p>
</td>
<td>
<p>Source</p>
</td>
<td>
<p>SCR</p>
</td>
<td>
<p>&lt;Source&gt;</p>
</td>
</tr>
<tr>
<td>
<p>ST</p>
</td>
<td>
<p>Semantic Type</p>
</td>
<td>
<p>D, SCR</p>
</td>
<td>
<p>&lt;SemanticType&gt;<br /><br />[where &lt;Concept&gt; attribute:]<br />PreferredConceptYN="Y"</p>
</td>
</tr>
<tr>
<td>
<p>SY</p>
</td>
<td>
<p>Synonym</p>
</td>
<td>
<p>SCR</p>
</td>
<td>
<p>&lt;Term&gt;</p>
<p>[And &lt;Term&gt; attributes:]<br />RecordPreferredTermYN="N" [AND]<br />PrintFlagYN="N" [AND]<br />IsPermutedTermYN="N"<br /><br />See also &lt;String&gt;, &lt;ConceptName&gt;</p>
</td>
</tr>
<tr>
<td>
<p>TN</p>
</td>
<td>
<p>Tree Node Allowed</p>
</td>
<td>
<p>Q</p>
</td>
<td>
<p>&lt;TreeNodeAllowed&gt;</p>
</td>
</tr>
<tr>
<td>
<p>UI</p>
</td>
<td>
<p>Unique Identifier</p>
</td>
<td>
<p>D, Q, SCR</p>
</td>
<td>
<p>&lt;DescriptorUI&gt;, &lt;QualifierUI&gt;, &lt;SupplementalRecordUI&gt;</p>
</td>
</tr>
</tbody>
</table>
<!-- ************************* MeSH Content end ************************* -->
<div>&nbsp;</div>
<p class=”margin-top-5”><small>Last Reviewed: June 6, 2016</small></p>
</div>
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