cat</a> </li><li> <a href="tech.v3.dataset.metamorph.html#var-concat-copying">concat-copying</a> </li><li> <a href="tech.v3.dataset.metamorph.html#var-concat-inplace">concat-inplace</a> </li><li> <a href="tech.v3.dataset.metamorph.html#var-data-.3Edataset">data-&gt;dataset</a> </li><li> <a href="tech.v3.dataset.metamorph.html#var-dataset-.3Ecategorical-xforms">dataset-&gt;categorical-xforms</a> </li><li> <a href="tech.v3.dataset.metamorph.html#var-dataset-.3Edata">dataset-&gt;data</a> </li><li> <a href="tec