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‎tutorials/odata-01-intro-origins/blogposts-with-abap-development-tag.png

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‎tutorials/odata-01-intro-origins/odata-01-intro-origins.md

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@@ -5,7 +5,7 @@ title: Learn about OData Fundamentals
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description: Discover OData's origins and learn about the fundamentals of OData by exploring a public OData service.
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auto_validation: false
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primary_tag: products>sap-cloud-platform
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tags: [ products>sap-cloud-platform, topic>cloud, topic>odata, tutorial>beginner ]
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tags: [ products>sap-cloud-platform, topic>cloud, programming-tool>odata, tutorial>beginner ]
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time: 15
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---
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@@ -33,49 +33,60 @@ The origin of OData's format comes from the world of weblogs, blogging and syndi
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> RSS is also known as "RDF Site Summary" or "Really Simple Syndication".
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Look at an example of the RSS representation of blog posts - in particular, the posts tagged **ABAP Development** with this URL:
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Let's look at an example of RSS. The National Aeronautics and Space Administration (NASA) maintains many RSS feeds, and you can see a list of them on the [NASA RSS Feeds](https://www.nasa.gov/content/nasa-rss-feeds) page. Go there now and select the [Breaking News](https://www.nasa.gov/rss/dyn/breaking_news.rss) feed which is at this URL:
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<https://blogs.sap.com/tags/833755570260738661924709785639136/>
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<https://www.nasa.gov/rss/dyn/breaking_news.rss>
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and select the **RSS** link as shown in the screenshot.
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![RSS link on page of blog posts](blogposts-with-abap-development-tag.png)
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The resulting RSS content of this resource should look something like this (reduced here for brevity):
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```xml
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<?xml version="1.0" encoding="utf-8"?>
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<rss xmlns:atom="http://www.w3.org/2005/Atom" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" xmlns:media="http://search.yahoo.com/mrss/" version="2.0" xml:base="http://www.nasa.gov/">
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<channel>
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<title>NASA Breaking News</title>
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<description>A RSS news feed containing the latest NASA news articles and press releases.</description>
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<link>http://www.nasa.gov/</link>
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<atom:link rel="self" href="http://www.nasa.gov/rss/dyn/breaking_news.rss"/>
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<language>en-us</language>
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<item>
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<title>NASA Administrator to Visit Florida Students, Industry</title>
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<link>http://www.nasa.gov/press-release/nasa-administrator-to-visit-florida-students-industry</link>
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<description>NASA Administrator Bill Nelson will speak to elementary school students about the future of space exploration Monday, May 9, and tour a lab working on robotic construction technologies Tuesday, May 10, during a trip to Florida.</description>
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<enclosure url="http://www.nasa.gov/sites/default/files/styles/1x1_cardfeed/public/thumbnails/image/nasa-logo-web-rgb_0.jpg?itok=mrBnB_c9" length="189751" type="image/jpeg"/>
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<guid isPermaLink="false">http://www.nasa.gov/press-release/nasa-administrator-to-visit-florida-students-industry</guid>
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<pubDate>Fri, 06 May 2022 11:13 EDT</pubDate>
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<source url="http://www.nasa.gov/rss/dyn/breaking_news.rss">NASA Breaking News</source>
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<dc:identifier>479411</dc:identifier>
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</item>
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<item>
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<title>NASA, ESA Astronauts Safely Return to Earth</title>
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<link>http://www.nasa.gov/press-release/nasa-esa-astronauts-safely-return-to-earth</link>
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<description>NASA’s SpaceX Crew-3 astronauts aboard the Dragon Endurance spacecraft safely splashed down Friday in the Gulf of Mexico off the coast of Florida, completing the agency’s third long-duration commercial crew mission to the International Space Station.</description>
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<enclosure url="http://www.nasa.gov/sites/default/files/styles/1x1_cardfeed/public/thumbnails/image/nhq202205060003.jpg?itok=nJXN4A_c" length="3817815" type="image/jpeg"/>
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<guid isPermaLink="false">http://www.nasa.gov/press-release/nasa-esa-astronauts-safely-return-to-earth</guid>
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<pubDate>Fri, 06 May 2022 01:04 EDT</pubDate>
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<source url="http://www.nasa.gov/rss/dyn/breaking_news.rss">NASA Breaking News</source>
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<dc:identifier>479399</dc:identifier>
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</item>
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</channel>
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</rss>
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```
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The resulting RSS content of this resource should look something like this:
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Observe the structure of the XML document. Within the outermost `<rss>` element, it describes a `<channel>` that has some metadata such as title and description. That `<channel>` contains one or more `<item>` elements, each of them representing a breaking news item.
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```xml
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<feed xmlns="http://www.w3.org/2005/Atom">
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<title>Latest blog posts for ABAP Development</title>
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<link rel="alternate" type="text/html" href="https://community.sap.com/"/>
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<id>https://community.sap.com/</id>
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<rights>© 2018 SAP SE https://www.sap.com/about/legal/copyright.html</rights>
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<logo>https://www.sap.com/dam/application/shared/logos/sap-logo-svg.svg</logo>
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<updated>2021-01-26T18:59:22Z</updated>
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<entry>
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<title>Getting Started with ABAP in 2021</title>
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<link rel="alternate" href="https://blogs.sap.com/?p=1259056"/>
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<category term="ABAP Development"/>
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<category term="#ABAP"/>
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<category term="#CDS"/>
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<category term="ABAP Beginner"/>
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<category term="abap beginners guide"/>
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<category term="beginner guide to HANA"/>
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<category term="Core Data Services (CDS)"/>
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<category term="Virtual Data Model"/>
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<author>
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<name>Markus Haug</name>
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</author>
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<id>https://blogs.sap.com/?p=1259056</id>
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<updated>2021-01-26T18:59:22Z</updated>
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<published>2021-01-26T18:59:22Z</published>
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<summary type="text">Whether you are new to ABAP or just want to learn something new this year, this blog post will give you an overview and a handful of helpful resources about all the new technologies in the ABAP cosmos. Not only the universe is expanding, but the ABAP world is also. ...</summary>
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</entry>
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...
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</feed>
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```
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rss
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|
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+-- channel
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|
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+-- item
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|
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+-- item
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|
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+-- ...
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```
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Observe the structure of the XML document. It describes a `feed` that has some metadata such as title, id, logo and information as to when it was last updated. That `feed` contains one or more `entry` elements, each of them representing a post in the list tagged with "ABAP Development". Think of this like a document, with a header and items.
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Think of this overall structure like a document, with a header and items.
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[VALIDATE_1]
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[VALIDATE_9]
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[ACCORDION-END]
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