\documentclass{standalone}
\usepackage{schule}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{schulinf}

\usetikzlibrary{arrows,arrows.meta,positioning,decorations.markings}

\providecommand{\textquotedbl}{''}

\begin{document}

\begin{tikzpicture}%[font=\sffamily]


%stil für aggregation
\tikzstyle{aggregation} = [,shorten >=17pt,
	decoration={
	      markings,
	      mark=at position 1 with {\arrow[scale=2.5,black]{open diamond}};}
]

%Stil für Vererbung
\tikzstyle{vererbung} = [shorten >=15pt,
	decoration={
	      markings,
	      mark=at position 1 with {\arrow[scale=2.5,black]{open triangle 45}};}
]



%Farben setzen
\renewcommand{\umltextcolor}{black}
\renewcommand{\umldrawcolor}{black}
\renewcommand{\umlfillcolor}{white}


%absatz
	\begin{object}[text width=8.0cm]{absatz1}{0,-10}
		\attribute{Zeichen = \diastring{Hallo, liebe Freundinnen und Freunde,}}
		\attribute{Ausrichtung = Zentriert}
		\attribute{Zeilenabstand = 1,5}
		\attribute{EinzugLinks = 2000}
		\attribute{EinzugRechts = 2000}
		\attribute{EinzugErstzeile = 0}
		\attribute{EinzugRestzeilen = 0}
		\attribute{AbstandOben = 0}
		\attribute{AbstandUnten = 0}
	\end{object}



\end{tikzpicture}


\end{document}
