Techniques are provided that include obtaining a Document Object Model of an HTML document. A configuration XPath is obtained identifying, as of a configuration time, a node within the Document Object Model as a native advertisement placement candidate container. Additional information is obtained regarding native advertisement placement candidate containers within the Document Object Model, and an injection XPath, identifying a node within the Document Object Model as a native advertisement placement candidate container, is generated at an injection time, subsequent to the configuration time, based on the configuration XPath and the additional information. The additional information may include information regarding at least one of a title element, description element and image element identified by a user as being associated with native advertisement placement candidate containers. Generating the injection XPath may include removing a numerical identifier from one or more tags of the configuration XPath.