gistfile1.txt

{!-- =========================================
this set_list tag stores the full original XXXXX 
feed into nicely accessible Stash vars. 
==========================================--}
{exp:stash:set_list
	name="all-performances"
	save="yes"
	replace="no"
	scope="site"
	trim="yes"
	parse_tags="yes"
}
	{exp:ajw_feedparser 
		url="https:XXXXX"
		itempath="/xml/Performance"
		parse="inward"
	}
		{stash:perf-id}{@ID}{/stash:perf-id}
		{stash:prog-id}{@ProgrammeID}{/stash:prog-id}
		{stash:start-day}{@StartDate}{/stash:start-day}
		{stash:start-date}{@StartDate} {@StartTime}{/stash:start-date}
		{stash:start-time}{@StartTime}{/stash:start-time}
		{stash:notes}{@Notes}{/stash:notes}
		
	{/exp:ajw_feedparser}
{/exp:stash:set_list}

{!-- =========================================
this stash:append tag pulls out a pipe-separated
list of all the programme-ids supplied by the 
full feed above, which are then fed into
 a standard EE channel:entries tag.
==========================================--}
{exp:stash:append name="prog-ids" parse_tags="yes" trim="yes"}
	{exp:stash:get_list name="all-performances" orderby="start-day" sort_type="integer"}
		|{prog-id}
	{/exp:stash:get_list}
{/exp:stash:append}