`<mdm:matchRules> validation errors`

These validation errors for Create Model and Update Model requests are specific to <mdm:matchRules>:

<mdm:matchRule> is empty. Error message:

<mdm:error>Match rule is empty</mdm:error>

<mdm:matchRule> has an invalid topLevelOperator attribute value. The valid values are AND, OR, and NOT. Error message:
```
<mdm:error>Invalid top-level operator in match rule</mdm:error>
```
<mdm:firstInput> or <mdm:secondInput> is missing its inputType attribute. Error message:
```
<mdm:error>Missing input type in advanced expression in match rule</mdm:error>
```
<mdm:firstInput> or <mdm:secondInput> has a child <mdm:inputType> element that does not contain either EXISTING, INCOMING, or STATIC. Error message:
```
<mdm:error>Invalid input type in match rule</mdm:error>
```
<mdm:simpleExpression> does not have a child <mdm:fieldUniqueId> element. Error message:
```
<mdm:error>Missing field ID in simple expression in match rule</mdm:error>
```
<mdm:firstInput> or <mdm:secondInput> does not have a child <mdm:fieldUniqueId> element. Error message:
```
<mdm:error>Missing field ID in Advanced expression in match rule</mdm:error>
```
<mdm:advancedExpression> has a child <mdm:ruleOperator> element that does not contain either IS_SIMILAR_TO, STRICT_EQUALS, or EQUALS. Error message:
```
<mdm:error>Invalid operator for advanced expression in match rule</mdm:error>
```
<mdm:advancedExpression> has a child <mdm:similarityAlgorithm> element that does not contain either Jaro-Winkler, Levenshtein, Bigram, Trigram, or Soundex. Error message:
```
<mdm:error>Invalid similarity algorithm for advanced expression in match rule</mdm:error>
```
<mdm:advancedExpression> does not have a child <mdm:similarityAlgorithm> or <mdm:tolerance> element, both of which are required because their peer <mdm:ruleOperator> element contains IS_SIMILAR_TO. Error message:
```
<mdm:error>Missing matching algorithm or tolerance in IS_SIMILAR_TO advanced expression in match rule</mdm:error>
```