hy­per­xmp – Embed XMP meta­data within a LaTeX doc­u­ment

XMP (eXten­si­ble Me­ta­data Plat­form) is a mech­a­nism pro­posed by Adobe for em­bed­ding doc­u­ment meta­data within the doc­u­ment it­self. The meta­data is de­signed to be easy to ex­tract, even by pro­grams that are obliv­i­ous to the doc­u­ment's file for­mat. Most of Adobe's ap­pli­ca­tions store XMP meta­data when sav­ing files. Now, with the hy­per­xmp pack­age, it is triv­ial for LaTeX doc­u­ment au­thors to store XMP meta­data in their doc­u­ments as well.
Ver­sion 2.2 of the pack­age added sup­port for the IPTC Photo Me­ta­data schema. It al­lows \xm­p­comma and \xm­pquote to be used in any hy­per­xmp op­tion, not only those that re­quire spe­cial treat­ment of com­mas. And it in­tro­duces an \xm­pline­sep macro that con­trols how mul­ti­line fields are rep­re­sented in the XMP packet.
The pack­age in­te­grates seam­lessly with hy­per­ref and re­quires vir­tu­ally no mod­i­fi­ca­tions to doc­u­ments that al­ready ex­ploit hy­per­ref's mech­a­nisms for spec­i­fy­ing PDF meta­data. The cur­rent ver­sion of hy­per­xmp can em­bed the fol­low­ing meta­data as XMP: ti­tle, au­thors, pri­mary au­thor's ti­tle or po­si­tion, meta­data writer, sub­ject/sum­mary, key­words, copy­right, li­cense URL, doc­u­ment base URL, doc­u­ment iden­ti­fier and in­stance iden­ti­fier, lan­guage, source file name, PDF gen­er­at­ing tool, PDF ver­sion, and con­tact tele­phone num­ber/postal ad­dress/email ad­dress/URL. Hyper­xmp cur­rently em­beds XMP only within PDF doc­u­ments; it is com­pat­i­ble with pdfla­tex, xe­la­tex, la­tex+dvipdfm, and la­tex+dvips+ps2pdf.