In some cases, it's also hard to map an object to XML (e.g., an object graph with cyclic references) because there's actually an impedance mismatch between an object model and an XML model.

Question

Quizplus · Accepted Answer

XML inherently represents hierarchical data structures, while object models can easily represent graphs with cycles, leading to difficulties in direct mapping between the two without additional mechanisms to handle such cases.

In Some Cases, It's Also Hard to Map an Object