_:n6e71a0bad3d0492d9cd38687b7a34c9axb0
<http://schema.org/description>
"I currently start to use text mining extension to extract chemical formula from PDF files. I use process documents from files operator and tokenize operator with regular expression. There are many chemical formulas in PDF files. I want to extract them. The chemical formulas are mostly like LiCoMnO4, 0.4Li2Mn0.06Ni0.2O4,…"
<https://community.rapidminer.com/discussion/59129/how-to-use-regular-expression-to-extract-chemical-formula>