@XData{macmillan:name,
	publisher = {Macmillan},
}

@XData{macmillan:place,
	location = {New York and London},
}

@XData{macmillan,
	xdata = {macmillan:name,macmillan:place}
}

@Book{recursive,
	author= {Wemheuer, Moritz},
	title= {Recursive shennenigans and other important stuff},
	date= {2016-04-03},
	xdata= {macmillan},
}

@periodical{polecon,
	title={Journal of Political Economy},
	date={2007-12},
	volume={115},
	number={6},
	editor={Uhlig, Harald and Heckman, James J. and Kamencia, Emir},
}

@article{arrgh,
	title={An‐arrgh‐chy: The Law and Economics of Pirate Organization},
	author={Leeson, Peter T.},
	crossref={polecon}
}

@www{issue201,
	title={Use of ids field creates unstable references},
	author={{cfr42}},
	url={https://github.com/plk/biblatex/issues/201},
	date={2014-02-02/2014-02-07},
	ids={unstable, github}
}

@misc{cannonfodder,
	title={An Insight into Bibliographical Distress},
	author={Aldrin, Buzz}
}

@thesis{haug2019,
	title={Batch Localization Algorithm for Floating Wireless Sensor Networks},
	author={Haug, Martin},
	type={Bachelor's Thesis},
	institution={Technische Universität Berlin},
	date={2019-10},
}

@mvproceedings{ill-defined,
	maintitle={Journal of Ill-Definedness},
	author={In a Basement, actually, Dude},
	month=oct,
	chapter={5},
	volumes={20},
	gender={attack helicopter}
}