Topic: Metadata – Ctrl blog

I miss del.icio.us – the web’s discovery-engine and link classifier

2022-10-10T10:34:00Z

Delicious (stylized after its domain del.icio.us) was a social bookmarking website. It might not sound all that interesting, but it was one of the best websites in the early 2000s. Here’s why I miss this defunct website so much.

Can you use a WebP file as an Open Graph Protocol image?

2022-04-25T20:19:00Z

The Open Graph Protocol (OGP) was created by and for Facebook in 2010. OGP is a pseudo-standard set of metadata tags you can include on your webpages to describe its contents. By now, it’s become the primary data source for generated link previews across the web and apps.

How to label a webpage as being out-of-date

2020-09-29T16:17:00Z

You might not want search engines to direct people to your outdated product pages or blog posts.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 Here’s how to label webpages as being out-of-date for humans and machines.

The difference between RDFa’s property and rel attributes

2020-08-16T07:54:00Z

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 property and rel attributes, and how the two interoperate when used on the same <a> or <link> element.

Embed XMP sidecars into image files with embed_xmp

2020-06-07T16:14:00Z

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.