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<div class="h1">Guide to Using the MeSH FTP Download Site</div>
</div>
</div>
<h4>MeSH FTP Directory Structure:</h4>
<p>MeSH data files are organized in folders by release year with the most recent files being stored in the&nbsp;<a title="Latest MeSH Files" href="p://nlmpubs.nlm.nih.gov/online/mesh/MESH_FILES">MESH_FILES</a> dirctory.</p>
<table class="table table-bordered border-dark">
<tbody>
<tr>
<th>MeSH FTP Folders</th>
<th>Description</th>
</tr>
<tr>
<td><strong>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1999-2010</strong></td>
<td>Includes all annual release files from 1999-2010</td>
</tr>
<tr>
<td><strong>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2011<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; |<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2XXX</strong></td>
<td>Separate folders for MeSH years 2011 through last year</td>
</tr>
<tr>
<td><strong>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;MESH_FILES</strong></td>
<td>The most recent MeSH files, updated Monday - Friday</td>
</tr>
</tbody>
</table>
<h4>Subfolders included under year folder</h4>
<table class="table table-bordered border-dark">
<tbody>
<tr>
<th>Folder Name</th>
<th>Description</th>
</tr>
<tr>
<td><strong>asciimesh</strong></td>
<td>MeSH ASCII files</td>
</tr>
<tr>
<td><strong>meshtrees</strong></td>
<td>Headings with Tree Nodes</td>
</tr>
<tr>
<td><strong>mtms</strong></td>
<td>MeSH translation files</td>
</tr>
<tr>
<td><strong>marc</strong></td>
<td>MeSH/MARC files</td>
</tr>
<tr>
<td><strong>newterms</strong></td>
<td>New MeSH terms and term changes</td>
</tr>
<tr>
<td><strong>xmlmesh</strong></td>
<td>MeSH files in XML format</td>
</tr>
</tbody>
</table>
<h4>&nbsp;</h4>
<h4>MeSH data files always include the MeSH Year. Below are example files for the 2016 MeSH year:</h4>
<table class="table table-bordered border-dark">
<tbody>
<tr>
<th>ASCII MeSH File Names</th>
<th>Description</th>
</tr>
<tr>
<td>c2016.bin</td>
<td>Supplemental Records for year 2016</td>
</tr>
<tr>
<td>d2016.bin</td>
<td>Descriptor Records for year 2016</td>
</tr>
<tr>
<td>q2016.bin</td>
<td>Qualifier Records for year 2016</td>
</tr>
<tr>
<td>mtrees2016.bin</td>
<td>MeSH headings with tree nodes for 2016</td>
</tr>
<tr>
<td>meshnew2016.txt</td>
<td>New Descriptor preferred terms for 2016</td>
</tr>
<tr>
<td>mnchg2016.txt</td>
<td>Tree changes for 2016</td>
</tr>
<tr>
<td>mshd2016.txt</td>
<td>All Descriptor preferred terms for 2016</td>
</tr>
<tr>
<td>replace2016.txt</td>
<td>Deleted and replaced Descriptor headings</td>
</tr>
</tbody>
</table>
<table class="table table-bordered border-dark">
<tbody>
<tr>
<th>XML* MeSH File Names</th>
<th>Description</th>
</tr>
<tr>
<td>desc2016.xml</td>
<td>Descriptor Records for year 2016</td>
</tr>
<tr>
<td>supp2016.xml</td>
<td>Supplemental Records for year 2016</td>
</tr>
<tr>
<td>qual2016.xml</td>
<td>Qualifier Records for year 2016</td>
</tr>
<tr>
<td>pa2016.xml</td>
<td>Pharmacological Actions of MeSH chemicals</td>
</tr>
<tr>
<td colspan="2"><em>*Note files ending with gz, and zip are compressed XML files </em></td>
</tr>
</tbody>
</table>
<table class="table table-bordered border-dark">
<tbody>
<tr>
<th><strong>MeSH/MARC File Names*</strong></th>
<th><strong>Description</strong></th>
</tr>
<tr>
<td style="height: 37px;">20160901_label_marc_change.bin</td>
<td style="height: 37px;">MeSH/MARC Update Label File for Sept 1, 2016</td>
</tr>
<tr>
<td>
<p class="MsoNormal">20160901_label_marc_full.bin</p>
</td>
<td>MeSH/MARC Full Label File for Sept 1, 2016</td>
</tr>
<tr>
<td style="height: 26px;">20160901_marc_change.bin</td>
<td style="height: 26px;">MeSH/MARC Update File for Sept 1, 2016</td>
</tr>
<tr>
<td>20160901_marc_full.bin</td>
<td>MeSH/MARC Full Release Files for Sept 1, 2016</td>
</tr>
<tr>
<td colspan="2"><em>*Note MeSH/MARC files now start with YearMonthDate. i.e. 20160101 = Jan 1, 2016</em></td>
</tr>
</tbody>
</table>
<p>&nbsp;</p>
<p>&nbsp;</p>
<p><strong><em>Need help? Please visit our: <a href="https://support.nlm.nih.gov/"> Customer Support Site</a></em></strong></p>
<p class=”margin-top-5”><small>Last Reviewed: June 26, 2018</small></p>
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