Relationship Notation

I am having a hard understanding the notation employed for the "Long Name" that appears in the Relationship Properties dialog.
Assume the following facts:
1) The parent object is the Source. Source is mandatory. Source to child (target) cardinality is "*" - i.e. the parent may have zero to many children.
Hence the Source Cardinality dialog shows the values "Source to Target Cardinality = *, and Source Optional check box is blank (i.e. parent is mandatory).
2) The child object is the Target. Target is optional. Target to parent (source) cardinality is "1' - i.e. the child must have exactly one parent.
Hence the Target Cardinality dialog shows the values "Target to Source Cardinality = 1, and Target Optional check box is checked (i.e. child is optional).
This results in a "Long Name" value of "Relation_X (ParentName - 1..*:0..1 - ChildName)"
This notation can be read as "ParentName has 1 to many ChildName" which would be incorrect.
Or, the notation can be read as "ParentName has zero or 1 ChildName, which also would be incorrect.
I don't know how to interpret the "Long Name" notation to make it consistent with the facts of this case. What am I missing?

RE: The parent object is the Source. Source is mandatory. Source to child (target) cardinality is "*" - i.e. the parent may have zero to many children.
I think by setting the Source to mandatory you are saying "The parent must have 1 to many children."
I think the problem you are having is the limited detail and sometime confusing User's Manual.
Here's what it says about the first checkbox:
Relation Cardinality: Source Optional: Controls whether the source entity in a relationship must, by default, contain one or more instances. If this option is enabled, source instances are not required for all relationship types; if this option is disabled, one or more source instances are required for all relationship types.
My interpretation of this is that the Source Optional checkbox determines whether or not the target entity is optional for the relationship when viewed from the source. If I'm correct then you are using the checkboxes backwards. (I'm new at this tool, but I've been doing data modeling for 30 years.)

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Let's say we have table1 and table2
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Table2 has ID, and let's say SSN for fields.
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