Posts

XPath & XQuery Tutorial for SQL Pros (Video)


Prior to starting at Altova I had zero experience with both XPath and XQuery. The first task I was presented with was to train myself on both query languages as quickly as possible and produce a concise video that would serve as an XPath tutorial and XQuery tutorial. It was important to develop a thorough understanding of their features and capabilities because both languages are integral to app development in MobileTogether and querying data in XMLSpy. I started with a strong background in SQL, learning XPath and XQuery by building queries first in SQL, and then determining how to replicate them in both query languages.

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How to Learn a New Programming Language this Summer


What better goal to set for your summer than learning a new programming language? Forget the “beach books” this summer and set your sights on diving into a new coding language – but which one should you pick?

As reported by EDC there are approximately 24 million professional software developers on Earth, and almost 700 notable programming languages (according to Wikipedia). I would wager a bet there is a staggeringly equal number of places online where you can learn one programming language or another. Whether you are already one of those 11 million coding experts or a newbie to programming, there is a plethora of information out there to sort though.

For the purposes for this blog post, we will certainly look at the world’s most-widely-used programming languages in 2021, but also at important languages for data manipulation and querying, so we’ll discuss: C and its derivatives (C++, C#, and Objective-C), Java, Python, R, JavaScript, Ruby, SQL, and XQuery.

Deciding where to start depends entirely on the kind of development scenarios you have in mind, so we’ve broken things down for you to make it easier. It doesn’t matter if you are a seasoned programmer looking to add a new language to your repertoire or a novice who doesn’t know the difference between C, C++, Objective-C, or C# yet. We have assembled a list of explanations to help you choose which language you may want to conquer next.

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XML Grid Gets a Makeover


If you’ve worked with XML in XMLSpy you’ve likely utilized XML Grid View to get a graphical representation of your XML document’s structure. This visual representation of the document’s hierarchical structure makes it immediately easier to understand and edit the content.

In the latest version of the XML editor, XML Grid looks a little different – in fact, it’s been completely rebuilt from scratch to offer even more unique functionality for editing, querying, calculating, and sharing XML data.

Learn about XML Grid in XMLSpy
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Build Custom Maps in Mobile Apps


In an earlier post we described how to integrate maps into cross-platform mobile apps with each end-user device’s native map application. Our example app generated a map with pins locating major airports in the United States. Illustrations showed maps generated by the same app on an Android phone, an iPhone, and Windows desktop.

What if a list of locations to be mapped is not known in advance, but generated based on user activity at run-time? MobileTogether, the low-code cross-platform mobile development tool from Altova, also empowers developers to build custom maps in mobile apps on the fly based on a list of geolocations generated at run time.

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How to Debug XSLT and XQuery


Nothing’s more frustrating than getting unintended results from an XSLT or XQuery transformation and having to spend hours tracking down the issue – especially if you’ve inherited the project from another developer or haven’t looked at the code in a few months.  Of course, XMLSpy has long included an XSLT debugger and XQuery debugger for setting break points and stepping through transformations to identify problems.

For a more interactive debugging process, XMLSpy also includes XSLT/XQuery back-mapping.

With back-mapping enabled, you can simply click on or hover over the portion of your output document you want to zero in on, and XMLSpy will immediately highlight the source XML and XSLT or XQuery instruction that is responsible. Let’s see how it works.

Debug XSLT with back-mapping

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Learn About XQuery Update Facility


XQuery Update Facility is an extension of the XQuery language that allows you to make changes in an XML instance using “update expressions” that insert, delete, replace, or rename nodes. This extension provides a convenient way to make intelligent updates to XML documents, and XMLSpy has a unique implementation that makes it even easier. Let’s see how it works.

News about XML find / replace

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