The Companion topics can be reduced to the following major topics. Each of these has many sub-sections, within which are further 'boxes-inside-boxes' sub sections, into which all of the book's articles can be categorised. They are numbered to facilitate searching and  note-taking:

01 - Vocal: Song in English, song in Irish, structure, styles, types, function, practices, singers, ballads, storytelling

02 - Instrumental music: tune types, instruments, transcription, style, ornamentation, composition, arrangement, classification, playing formats, regional styles

03 - Dance: Dance metres, artistic (display) dance, social dance, history, styles, ideology, competition, organisation

04 – Organisation: Fleadh, session, festival, events, organisation, promotion, education, performance, funding, buildings, policies, institutions, spaces, web, international, awards

 05 - Transmission: Oral, broadcasting, recording, digital, teaching and learning, schools, collection, notation, tune books, song collections, audiovisual, Diaspora, migration

 06 – People: Singers, dancers, musicians, instrument makers, organisers, promoters, broadcasters, teachers, collectors, analysts, journalists, bands

 07 – Analysis: Bibliography, information, archiving, academic, research, literature, history

08 - Women in traditonal music

09 - Listing of All-Ireland fleadh cheoil senior winners in main categories

10 - Analysis of All-Ireland fleadh results by region and gender

Each of these topics will be developed with appropriate extra material - music, images and web links - in time. Many of the individual articles have connections with a number of the major sections outlined. For instance, an individual like the uilleann piper Willie Clancy comes under the category of 'People' (as a performer, stylist, authority, singer and personality). But he also comes in under 'Social Customs' (which includes 'regional styles'), under 'Transmission' (as he was an influential teacher), under 'Song' (he was a recorded singer),  and under 'Instrumental' (his music has been notated and his style analysed). So too Seamus Ennis will cross categories as an authority, stylist, singer, storyteller, collector, performer, teacher, professional, researcher and broadcaster; Josephine Keegan can be seen as having cross links as performer, fiddler, composer, personality and publisher, as well as being associated with recording, broadcasting, collecting, Co. Armagh and with England. While the A-Z Articles page will eventually carry references to such cross-links, these can never be complete, for it is the reader who will best make connections in the reading of the whole text.

Web Links

These are included in the text to expand the knowledge potential of The Companion out beyond what is in the printed articles to the broader world of the music. But they can change continually.

Amendments, contributions and links are welcomed and should be sent to the editor by email (see CONTACT above) using 'companion links' in the subject line.

• For a full list of all A-Z entries and word-counts see ENTRIES
  
• For an interim list of referenced people and bands see INDEX