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31.2 Instance</div>
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<li value="1" class="Element600">Top-level instances shall be accessed using vpi_iterate() with a NULL reference object.</li>
<li value="2" class="Element600">Passing a NULL handle to vpi_get() with types vpiTimePrecision or vpiTimeUnit shall return the smallest time precision of all instances in the design.</li>
<li value="3" class="Element600">If an instance is an element within an array, the vpiIndex transition is used to access the index within the array. If the instance is not part of an array, this transition shall return NULL.</li>
<li value="4" class="Element600">Compilation units are represented as packages that have a vpiUnit property set to TRUE. Such implicitly declared packages shall have implementation dependent names.</li>
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