lProperty12about_value_E"></span><span id="_CPPv2N8omexmeta16PhysicalProperty12about_value_E"></span><span id="omexmeta::PhysicalProperty::about_value___ss"></span><span class="target" id="classomexmeta_1_1PhysicalProperty_1acdec5ae85563d2b3f92a9ea15e2bf060"></span><span class="n"><span class="pre">std</span></span><span class="p"><span class="pre">::</span></span><span class="n"><span class="pre">string</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">a