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The “xpath function” is not the first function that comes to mind in Power Automate, and it’s not the most obvious; I’ll give you that, but it can be super powerful and useful if you understand how it works. The function will help us parse XML files to find information, get blocks of nodes, and even get analytics on the file, like the number of nodes. Again, it’s not the most straightforward, but I’ll do my best to explain how to take advantage of it and how it works.Let’s start where you can find it.Where to find the “xpath” function?You can find the function in every action where a formula is supported. For example, let’s look at a “Compose” action:As you can see, we can auto-complete by using the “tab” key. Let’s look at how to use it.UsageIt follows a simple pattern.XML document to look for data.The expressionThis function requires that the first parameter is an XML Document, not a string. This is something that most people get wrong, so please take this into consideration. If you get an error, please refer to the “Common Mistakes” section below for potential solutions.Test XMLI’ll perform actions on the following sample XML document to keep the examples short and not include the full XML definition. You can find a copy of this file in Microsoft’s Official Documentation. Gambardella, Matthew XML Developer's Guide Computer 44.95 2000-10-01 An in-depth look at creating applications with XML. ...... Galos, Mike Visual Studio 7: A Comprehensive Guide Computer 49.95 2001-04-16 Microsoft Visual Studio 7 is explored in depth, looking at how Visual Basic, Visual C++, C#, and ASP+ are integrated into a comprehensive development environment. Here’s how we’re using it:As we mentioned before, the XML provided to the function cannot be a string, so we need first to convert it. Another important thing to understand is that the “xpath function” won’t return a string, but we’ll explore this in the next example.Get all the elementsLet’s start with something simple. Let’s get all the “ book“ elements in the XML document. To do that, we use the names in

An index or a function (for example, the “last()” function). Now we’re providing a comparison, so the engine will look at all items that are books, and, for those with a “gender” element, it will check if it satisfies our criteria.We can go even bit further by using comparisons other than equals like this:xpath(outputs('Convert_to_XML'), '//book[price>10]')With this, we’ll get all books with an element called “price”, which is above 10.Check how many elements.Sometimes we’re not interested in a specific element but how many there are. Like before, we could iterate and count them, but that’s too cumbersome and slow, so using the previous example, let’s check how many books there are in the XML.xpath(outputs('Convert_to_XML'), 'count(//book)')We use it similarly to the “string” function by providing the element we want to count. Here’s the result for the test file:NamespacesFinally, we’ll explore namespaces. There’s a good explanation here on why they exist, but you can spot them in XML like this: Apples Bananas Notice that the XML contains a prefix for each of the elements. When we search, we need to tell the parser that we want to ignore the namespace; otherwise, the elements won’t be found. Let’s put this into practice. Let’s say that we change our test XML to contain the namespaces like this: Gambardella, Matthew XML Developer's Guide Computer 44.95 2000-10-01 An in-depth look at creating applications with XML. ...... Galos, Mike Visual Studio 7: A Comprehensive Guide Computer 49.95 2001-04-16 Microsoft Visual Studio 7 is explored in depth, looking at how Visual Basic, Visual C++, C#, and ASP+ are integrated into a comprehensive development environment. As a refresher, here’s how we get the first element:xpath(outputs('Convert_to_XML'),'string(//book/author)')Since we have a fixed name above for “book” and “author” we can define it statically, but if there’s a namespace, we need to use the following syntax to do an additional search for the name of the element:*[local-name()="book"]This will use the “local-name” function to check if the element’s key is a book. If we replace it with the above function here’s what we’ll get:xpath(outputs('Convert_to_XML_2'),'string(//*[local-name()="book"]/*[local-name()="author"])')We’ll get the same author name when we run the Flow.Common Mistakes