\providecommand{\pdfxopt}{a-1b,allxmp,mathxmp} % XMP Metadata first \begin{filecontents*}{\jobname.xmpdata} \Title{Unicode: U₄(ℤ[1/√2, i]). — ASCII: !"'()*+,-./:;<=>?@[]`|#$&~^_. Four escaped symbols: \% \backslash\ \{ \}. } \Author{Gödel\sep Escher\sep %ÅąŅƅDžȅɅ Dž Bach\sep U₄(ℤ[1/√2, i]), !"'()*+,-./:;<=>?@[]`|#$&~^_, \% \backslash\ \{ \}} \Subject{This is the abstract. It's about ℤ[1/√2, i] and other rings. \mathbf{A\,+\,B \;=\; C*D/\alpha_{i}^{34}\beta}} \Keywords{the group U₄\sep and other stuff\sep Some symbols: & # < > \copyright\ 2014\sp{20125621} } \Copyright{Copyright \copyright\ 2014 \textLF The artist known as Ƭ̵̬} \CopyrightURL{http://www.mathstat.dal.ca/~selinger/copyright.html} \Creator{pdfTeX + pdfx.sty with \pdfxopt\space option} \Journaltitle{abc \textLF \S \ddag \dots ÀÁÂÃÄ %ÅąŅƅDžȅɅ % A0 = 10100000 ÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÛÜÝß %Ņ %àĠŠƠǠȠ † % 85 = 10001010 %⅀⅁⅒⅕⅘ % ⠱ ⠲ ⠵ ⠷ áâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ\P } % \dag \ddag \dots \S \P } % \textLF \(\mathbf{A}+\mathcal{B} = \mathfrak{C}*\mathsf{D}/\vec{\mathsfbf{E}}\widetilde{ab}\)} \end{filecontents*} % \documentclass{article} %\usepackage[a-1b,e-1,vt-1]{pdfx-16} %\usepackage[utf8]{inputenc} %\usepackage[OT1,T1]{fontenc} \usepackage{amssymb} \usepackage{sansmath} \usepackage[\pdfxopt]{pdfx} %\usepackage[LY1]{fontenc} \usepackage[OT1,T1]{fontenc} \usepackage{textcomp,ptmxcomp,tipa,extraipa} %\listfiles \tracingstats=2 \begin{document} \noindent In this example, only the metadata matters; apart from checking accents: {\`a \'e \"u} and whether other characters still work consistently: \dag \ddag \dots \S \P \$ $\bullet\dots \dag\ddag $ {\makeatletter % %\def\this{119808} %{1D400} %\HyPsd@ConvertToUnicode\this %\tracingall %\show\this %\pdfstringdef\this{\ensuremath{\mathbf{A}}} %\show\this } \end{document} Memory usage before: 692&171340; after: 203&171195; still untouched: 4812814 mathxmp Memory usage before: 692&183143; after: 203&182998; still untouched: 4800985 allxmp Memory usage before: 692&189509; after: 203&189364; still untouched: 4794613