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They're both different, use both. $alt_element = $doc->createElement("i", $title_text); $para_element->appendChild($title_element); } 0 0 vertex 7.48323 5.00013 3 facet normal 9.613948e-001 4.721924e-003 2.751321e-001 facet normal -0.000195511 0.116119 0.993235 facet normal -0.00385378 0.367708 0.929933 vertex -0.303284 -7.37107 6.90571 vertex 4.89431 5.50428 6.95641 facet normal 0.0221491 -0.0970093 0.995037 vertex 3.43863 -8.76148 20.0916 facet normal 0.615693 0.525853 0.586857 vertex 6.10385 -1.79038 19.9 facet normal 4.395878e-001 -7.536187e-001 4.886936e-001 vertex -1.315106e+000 3.879837e+000 2.480400e+001 facet normal 6.204278e-01 0.000000e+00 7.842636e-01 facet normal 0.544076 0.225367 0.808202 facet normal 4.926588e-001 -8.446022e-001 2.096052e-001.

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