Four parameters of inclusion/exclusion have been applied:
1) PUBLIC VS PRIVATE MEMORIALS
Only public permanent physical forms of memorialization have been included. As a result, memorials located on private premises and accessible by invite or pre-booking only (such as inside governmental buildings, party offices, Orange Order halls, churches and police barracks) have not been included. Memorials in graveyards, outside governmental buildings, party offices, Orange Order halls, churches and police barracks and within the grounds of private clubs but freely accessible to the public have been included.
2) GEOGRAPHICAL LOCATION
All memorials included in this database are located in the Belfast Urban Area, although data related to permanent memorials throughout Northern Ireland is included in the book in order to acquire a general picture of the culture of commemoration in the province.
3) TROUBLES-RELATED MEMORIALIZATION
Only Troubles-related forms of memorialization are included, i.e. commemorative sites in memory of individuals who lost their lives as a direct result of the Northern Irish conflict from 1969 – conventionally taken as its starting date – to the present day. However, both Republican and Loyalist modes of memory encourage references to pre-Troubles iconic events such as the 1916 Easter Rising or the Battle of the Somme, therefore memorials commemorating pre-1969 historical figures, groups or events have been included since they were commissioned alongside Troubles-related forms of memorialization by the same associations or groups.
4) PARAMILITARY MEMORIALIZATION
The database mainly includes commemorative forms relating to Republican and Loyalist paramilitary culture. Memorials to civilian casualties, security forces and other agencies who lost their lives as a direct result of the Northern Irish conflict are also included and have been grouped under the ‘Other’ category.