mplate-Operation>Rule.HeaderOperationTemplate.Operation</a></code></td><td><p>Optional. Header operation type. Default operation is to replace the value of the header by name.</p></td></tr></tbody></table></section><h2 id=Rule-HeaderOperationTemplate-Operation>Rule.HeaderOperationTemplate.Operation</h2><section><p>Header operation type.</p><table class=enum-values><thead><tr><th>Name</th><th>Description</th></tr></thead><tbody><tr id=Rule-HeaderOperationTemplate-Operation-REPLACE><td><code>REPLACE</code></t