These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.07 s (backtrack: 0/20).

[ebuild  N     ] app-text/docbook-sgml-dtd-3.0-r5:3.0::gentoo  43 KiB
[ebuild  N     ] app-text/openjade-1.3.2-r9::gentoo  874 KiB
[ebuild  N     ] app-text/xhtml1-20020801-r6::gentoo  227 KiB
[ebuild  N     ] app-text/docbook-sgml-dtd-4.0-r5:4.0::gentoo  55 KiB
[ebuild  N     ] app-text/docbook-sgml-dtd-4.2-r4:4.2::gentoo  61 KiB
[ebuild  N     ] app-text/docbook-sgml-dtd-3.1-r5:3.1::gentoo  55 KiB
[ebuild  N     ] app-text/docbook-sgml-dtd-4.4-r2:4.4::gentoo  66 KiB
[ebuild  N     ] app-text/docbook-sgml-dtd-4.1-r5:4.1::gentoo  56 KiB
[ebuild  N     ] app-text/docbook-xml-simple-dtd-4.1.2.4-r4:4.1.2.4::gentoo  35 KiB
[ebuild  N     ] app-text/docbook-xml-simple-dtd-1.0-r3:1.0::gentoo  31 KiB
[ebuild  N     ] app-text/docbook-dsssl-stylesheets-1.79-r4::gentoo  272 KiB
[ebuild  N     ] app-text/docbook-sgml-utils-0.6.14-r6::gentoo  USE="-jadetex" 123 KiB
[ebuild  N     ] media-gfx/pngtools-0.4_p20220314::gentoo  637 KiB

Total: 13 packages (13 new), Size of downloads: 2528 KiB