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<div class="title">DAP2 Support </div> </div>
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<div class="toc"><h3>Table of Contents</h3>
<ul><li class="level1"><a href="#dap_introduction">DAP2 (OPeNDAP) Introduction</a><ul><li class="level2"><a href="#dap_dap_information">OPeNDAP Documentation</a></li>
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<div class="textblock"><h1><a class="anchor" id="dap_introduction"></a>
DAP2 (OPeNDAP) Introduction</h1>
<p>Beginning with netCDF version 4.1, optional support is provided for accessing data through OPeNDAP servers using the DAP protocol. Currently, only DAP protocol version 2 is supported; DAP protocol version 4 support is under development.</p>
<p>DAP support is automatically enabled if a usable curl library can be set using the LDFLAGS environment variable (similar to the way that the HDF5 libraries are referenced). DAP support can forcibly be enabled or disabled using the –enable-dap flag or the –disable-dap flag, respectively. If enabled, then DAP2 support requires access to the curl library. Refer to the installation manual for details</p>
<p>DAP uses a data model that is different from that supported by netCDF, either classic or enhanced. Generically, the DAP data model is encoded textually in a DDS (Dataset Descriptor Structure). There is a second data model for DAP attributes, which is encoded textually in a DAS (Dataset Attribute Structure). For detailed information about the DAP DDS and DAS, refer to the OPeNDAP web site <a href="http://opendap.org">http://opendap.org</a>.</p>
<h2><a class="anchor" id="dap_dap_information"></a>
OPeNDAP Documentation</h2>
<p>See the following pages for more information.</p>
<ul>
<li><a class="el" href="dap_accessing_data.html">Accessing OPeNDAP Data</a></li>
<li><a href="auth.md">netCDF Authorization Support</a></li>
<li><a class="el" href="dap_to_netcdf.html">DAP to NetCDF Translation Rules</a></li>
<li><a class="el" href="dap2_reserved_keywords.html">DAP2 Reserved Keywords</a></li>
<li><a class="el" href="var_dim_trans.html">Variable Dimension Translation</a></li>
<li><a class="el" href="var_name_trans.html">Variable Name Translation</a> </li>
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