function filterPmWiki( contentFilename ){
        // if (!file) return
	// special filter, done via URL, no local file (for now at least)

        if ( contentFilename.endsWith("?action=source") ) { // not very reliable
                console.log('it is a pmwiki file', contentFilename)

		// mereology option
		let openingOptions = filesWithMetadata[contentFilename].openingOptions
		// can be used via e.g. showFile("https://fabien.benetou.fr/?action=source",{ mereology:"whole"})

		fetch( contentFilename )
		.then( r => r.text() ).then( r => {
			// console.log('pmwiki', r)
			// TODO 
				// diff support to replay over time, e.g. https://fabien.benetou.fr/PIMVRdata/ItemsStates?action=diff
				// index as a special case https://fabien.benetou.fr/Site/AllRecentChanges?action=source 
				// rendered previews e.g https://vatelier.benetou.fr/MyDemo/newtooling/textures/fabien.benetou.fr_PIMVRdata_ItemsStates.png
				// server side graph generation e.g. https://vatelier.benetou.fr/MyDemo/newtooling/wiki_graph.json
					// very specific

			let elements = []
			console.log( "mereology", openingOptions.mereology )
			switch( openingOptions.mereology ) {
				case "whole":
					elements.push( addNewNote(r, "0 1.4 -.8") )
				break;
				case "section":
					r.split(/! /).map( (c,i) => elements.push( addNewNote(c, "0 "+(1+i/10)+" -.8") ) ) // untested
				break;
				case "line":
					r.split('\n').map( (c,i) => elements.push( addNewNote(c, "0 "+(1+i/10)+" -.8") ) )
				break;
				case "listonly":
				default:
					r.replaceAll('* ','').split('\n').map( (c,i) => elements.push( addNewNote(c, "0 "+(1+i/10)+" -.8") ) )
					// this is specific to https://fabien.benetou.fr/PersonalInformationStream/WithoutNotesMay2025 and similar
			} 
			elements.map( el => { el.classList.add('pmwikifilter'); el.classList.add('filterimport') } )
			// for something more generic see https://www.pmwiki.org/wiki/PmWiki/PageFileFormat
					
			AFRAME.scenes[0].emit('pmwikiloaded', contentFilename)
			// to use the event consider :
			//AFRAME.scenes[0].addEventListener("pmwikiloaded", e => console.log(e))
		})
        }
        applyNextFilter( contentFilename )
}

sequentialFilters.push( filterPmWiki )