Documenting changes

Changes to the IMO Compendium are documented per individual change, e.g.

[+] add new data element;
[*] update an existing data element;
[-] remove data element from a data set; 
[x] remove data element from the Compendium,

which are referenced by an EGDH meeting number.

Changes are documented under the section "Overview of Changes" in the HTML publication and under the sheet "Changes" in the MS Excel publication of the IMO Compendium.

Additionally, the history of all other publications is tracked under the section "History" in the HTML publication.