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Two systems that look like one and are not, which is the reason this family exists rather than two. The inline date symbols — a star for a birth, a cross for a death, joined rings for a marriage — are a customary convention with no governing authority, strongest in German, Dutch and Scandinavian publishing and largely absent from English-language work; the cross is under live objection for use with people who were not Christian. The pedigree chart is the opposite: squares, circles and connecting lines codified by a clinical standards body and revised, because a chart that can be read two ways is a hazard when it is used to reason about inheritance. Knowing which of the two you are looking at determines how much weight the symbols will bear.
The small marks that stand in for born, died and married before a date.
A star before a date meaning the person was born then.
A cross before a date meaning the person died then.
Two interlocked rings before a date, meaning a marriage.
The marriage rings drawn apart, meaning the marriage ended.
A wavy line or a small basin before a date, marking a baptism.
A small coffin or urn outline before a date, marking a burial.
The squares, circles and connecting lines of a formal family diagram.
A square for a male individual, a circle for a female, a diamond where unknown.
A shaded square or circle: this person has the condition being traced.
A stroke through a square or circle meaning the person has died.
An arrow marking the individual the chart was drawn for.
Two parallel lines joining a couple who are blood relatives.
The vertical and horizontal lines that carry the relationships in a tree.