urn:uuid:71d67df6-fc03-57b4-91ce-5c51c519f957 Topic: Metadata – Ctrl blog Daniel Aleksandersen https://www.daniel.priv.no/ Copyright © 2020 Daniel Aleksandersen. https://www.ctrl.blog/assets/favicon/favicon.svg 2020-10-08T22:12:00Z weekly 10 urn:uuid:ba6301cd-ca61-43d6-a113-a486b52fc724 2020-09-29T16:17:00Z 2020-10-08T22:12:00Z How to label a webpage as being out-of-date Humans will understand an “out-of-date” label near an article’s dateline. Here’s how to make search engines aware of outdated pages in a machine-readable format. <p>You might not want search engines to direct people to your outdated product pages or blog posts. Especially when your site has other and more up-to-date webpages available. Here’s how to label webpages as being out-of-date for humans and machines.</p> <p><a href="https://www.ctrl.blog/entry/label-outdated-webpages.html">Read more …</a></p> urn:uuid:1c44958b-a118-4d0e-9fcb-0a96a9f15ff9 2020-08-16T07:54:00Z 2020-08-16T07:54:00Z The difference between RDFa’s property and rel attributes The difference between RDFa’s <code translate="no">property</code> and <code translate="no">rel</code> attributes You can easily get unexpected HTML+RDFa Lite parsing results by unknowingly using it with RDFa Core attributes that just happens to also be HTML attributes. <p>I’ve talked about HTML link metadata in the past. In that earlier article, I glanced over one detail that gave me a serious headache this week. That issue was the difference between the <code>property</code> and <code>rel</code> attributes, and how the two interoperate when used on the same <code><a></code> or <code><link></code> element.</p> <p><a href="https://www.ctrl.blog/entry/rdfa-link-attributes.html">Read more …</a></p> urn:uuid:07616fda-8ee7-4e89-8d7c-6f8f100c9ad5 2020-06-07T16:14:00Z 2020-09-02T02:02:00Z Embed XMP sidecars into image files with embed_xmp Embed XMP sidecars into image files with <code translate="no">embed_xmp</code> Here’s my new utility program and Ruby library for embedding XMP sidecar files (.xmp/.xml) into JPEG, PNG, SVG, and WebP image files. <p>I wanted a program to inject Extensible Metadata Platform (XMP) sidecar (stand-alone) files into an image file. Image metadata is most useful when embedded into image files after all. I was surprised to learn that options for XMP editors were thin on the ground. I had to create a new program to get the job done.</p> <p><a href="https://www.ctrl.blog/entry/embed-xmp.html">Read more …</a></p> urn:uuid:2ae26e06-e890-4527-8af9-9b2d99bf5eb8 2019-05-29T12:54:00Z 2019-05-29T12:54:00Z URLs don’t belong in <meta> elements URLs don’t belong in <code translate="no">&lt;meta&gt;</code> elements Why the <link> element, a metadata element for link type data, is better suited for links than the more generic <meta> element. <p>There’s more than one HTML element designed to hold metadata. <em>Any</em> HTML element can hold metadata with HTML+RDFa, but for the context of this article I’ll focus on the HTML-standard <code><link></code> element. It’s used to build link relations between documents and resources.</p> <p><a href="https://www.ctrl.blog/entry/html-link-metadata.html">Read more …</a></p> urn:uuid:32037364-6eb8-4da7-8db9-a730fa285893 2019-05-20T06:14:00Z 2019-05-20T06:14:00Z Put your image metadata to use: embed it in your image files Put your existing image metadata to good use. Embed descriptions, copyright information, and more into your images to improve Bing/Google Image Search results. <p>Your content management system (CMS) probably already have a lot of metadata associated with your website’s images. Including information about the image’s creator, licensing and copyright notices, when and where you obtained it and under which terms, titles, and image descriptions or “alt” texts, etc. Put this information to use for you inside your image files to protect your intellectual property rights and make the images more discoverable.</p> <p><a href="https://www.ctrl.blog/entry/embedded-image-metadata.html">Read more …</a></p>