One example would be to spell out the types:This flattens the data, which might not be the desired effect--plus it adds cumbersome text in order to spell out the two types. XML, however, just has nodes and attributes, and as a result, won’t require such client changes unless you add additional structure.Programmatically processing data is far easier and more power in XML than JSON. Schemas, meanwhile, offer a way to construct specific XML implementations to offer better interoperability, and provide a way for validation. JavaScript, as a client-side programming language, requires execution within the browser, and we all known how well browsers adhere to standards. Microsoft, in particular, went wild with JavaScript and CSS implementations, which made programming on the client-side difficult. This could be seen as an added layer of description or context to the markup--better fleshing out of the data. So if you need to send the file over network, Json may be the better choise, or if you want to be able to read it, XML Also, the object-oriented nature of the JSON data, once parsed into JavaScript, is a great way to traverse data. Let's look at an example where the expectation is a student's exam results with questions and the selected answer:What if the original requirements strictly said that only one answer was to be allowed per question, but those requirements later changed in the middle of a semester to allow for multiple answers? Remember that XML, at heart, is a markup language, and in addition to representing data, it also describes the data. The site may not work properly if you don't If you do not update your browser, we suggest you visit Press J to jump to the feed. I am pointing out that there are pros and cons to both formats and I believe it is unreasonable to automatically assume that JSON is smaller, more readable, or more editable.For the sake of this chapter, we’ll go with the assumption that on face value, JSON is smaller than XML, so that we can focus on data structure and data interchange.Although you wouldn't know if from the title of this chapter, I think that JSON is an excellent data format... for JavaScript. As shown with the telephone example, and with Longden’s xml:lang example, since XML is represented by nodes and node lists with text and attributes, adding additional data is as simple as tacking on a node, but in JSON, how do you extend a key/value property where the value type is an integer or a decimal?Again, this isn't to say that JSON isn't a good data format.
Although these libraries certainly work, once again we see the limitations of JSON that cause programmers to develop libraries to duplicate tools and functionality already present and available in other languages such as XML. In order to compensate for attributes at the same level with the same name, JSON requires either flattening the data by changing the name or altering the structure to create more in-depth objects. JavaScript frameworks made this easier, and started to take the sting out of the client-side focus.Frameworks like jQuery might have made things a little too easy. Why so many frameworks, and why the need? I do not, however, believe that JSON is the best data format for decoupled programs and/or services.Although JSON is considered a language independent data format, there is no denying that its basis lies in JavaScript, and it is with JavaScript that JSON has the most power. I was trying to use XSLT as well, found few scripts that work, but I cant quiet understand what is happening in the code. Advanced JavaScript controls made possible by jQuery plugins, or some of the more desktop looking items found in With JavaScript, script-kiddies is a term most often used to refer to those who download JavaScript snippets from online repositories or jQuery plugins in order to display a certain effect, be it an accordion, cover flow, or adding movement to special elements. Programmer Ben Longden (The XML above is opposed to the possible JSON structures below :Namespaces and schemas also offer greater power for XML than its JSON counterpart. Although JSON is considered human readable, it certainly isn’t as clean as XML, and larger data sets become even more difficult to ascertain, especially for non-programmers. JSON was created (or discovered) to be a streamlined data format. Never believe a PM/PO telling you you only need to run a process once !Thanks for your suggestion. © 2015-2020 Bill Ahern & Michael Szul. With JSON, because its basis is in JavaScript (and certainly if one were using JavaScript like is most common today), you cannot travel back up the data structure because of the possibility of multiple pointers.This isn't to say that advanced selectors aren't available in JavaScript for processing JSON through regular expressions or other text processing means. Json can be somethimes less readable by humans than xml, but the size of the file generated by json is smaller. XML was devised as a simpler solution that contained the generic coding and formatting purpose of SGML, as well as general communication and semantic information for consumption.
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