avi@seahorse avi $ emerge -s sgml
Searching...
[ Results for search key : sgml ]
[ Applications found : 8 ]

*  app-text/docbook-sgml
      Latest version available: 1.0
      Latest version installed: 1.0
      Homepage:
      Description: A helper package for sgml docbook

*  app-text/docbook-sgml-dtd
      Latest version available: 4.1
      Latest version installed: 4.1
      Homepage: http://www.oasis-open.org/docbook/sgml/4.1/index.html
      Description: Docbook SGML DTD 4.1

*  app-text/docbook-sgml-utils
      Latest version available: 0.6.11-r1
      Latest version installed: 0.6.11-r1
      Homepage: http://sources.redhat.com/docbook-tools/
      Description: Shell scripts to manage DocBook documents

*  app-text/psgml
      Latest version available: 1.2.4
      Latest version installed: [ Not Installed ]
      Homepage: http://psgml.sourceforge.net
      Description: PSGML is a GNU Emacs Major Mode for editing SGML and XML coded documents.

*  app-text/sgml-common
      Latest version available: 0.6.3-r2
      Latest version installed: 0.6.3-r2
      Homepage: http://www.iso.ch/cate/3524030.html
      Description: Base ISO character entities and utilities for SGML

portage: aux_get(): (1) couldn't open cache entry for app-text/sgml2x-0.11-r1
(likely caused by syntax error or corruption in the app-text/sgml2x-0.11-r1 ebuild.)
emerge: search: aux_get() failed, skipping
*  app-text/sgmltools-lite
      Latest version available: 3.0.3-r5
      Latest version installed: 3.0.3-r5
      Homepage: sgmltools-lite.sourceforge.net
      Description: Python interface to SGML software specificially in a DocBook/OpenJade environment. Provides sgml2{html,txt,rtf,dvi,ps}

*  dev-perl/SGMLSpm
      Latest version available: 1.03-r3
      Latest version installed: 1.03-r3
      Homepage: http://cpan.perl.org/pub/perl/CPAN/modules/by-module/SGMLS/SGMLSpm-1.03ii.readme
      Description: Perl library for parsing the output of nsgmls

avi@seahorse avi $ emerge -s docbook
Searching...
[ Results for search key : docbook ]
[ Applications found : 8 ]

*  app-text/docbook-dsssl-stylesheets
      Latest version available: 1.77
      Latest version installed: 1.77
      Homepage: http://www.sourceforge.net/docbook/
      Description: DSSSL Stylesheets for DocBook.

*  app-text/docbook-sgml
      Latest version available: 1.0
      Latest version installed: 1.0
      Homepage:
      Description: A helper package for sgml docbook

*  app-text/docbook-sgml-dtd
      Latest version available: 4.1
      Latest version installed: 4.1
      Homepage: http://www.oasis-open.org/docbook/sgml/4.1/index.html
      Description: Docbook SGML DTD 4.1

*  app-text/docbook-sgml-utils
      Latest version available: 0.6.11-r1
      Latest version installed: 0.6.11-r1
      Homepage: http://sources.redhat.com/docbook-tools/
      Description: Shell scripts to manage DocBook documents

*  app-text/docbook-xml-dtd
      Latest version available: 4.1.2-r3
      Latest version installed: 4.1.2-r3
      Homepage: http://www.oasis-open.org/docbook/
      Description: Docbook DTD for XML

*  app-text/docbook-xml-simple-dtd
      Latest version available: 4.1.2.4
      Latest version installed: 4.1.2.4
      Homepage: http://www.oasis-open.org/docbook/
      Description: Docbook DTD for XML

*  app-text/docbook-xsl-stylesheets
      Latest version available: 1.52.2
      Latest version installed: 1.52.2
      Homepage: http://www.oasis-open.org/docbook/
      Description: XSL Stylesheets for Docbook

*  app-text/docbook2X
      Latest version available: 0.6.1
      Latest version installed: [ Not Installed ]
      Homepage: http://docbook2x.sourceforge.net
      Description: Tolls to convert docbook to man and info