> On 3 Jul 2018, at 22:24, Alan Johnston <[email protected]> 
> wrote:
> 
> Hello I am Alan as some of you already know, I am looking to create a new 
> search engine that will be just for virtual worlds. Im  looking to create a 
> crawler that will look at the grids website, and also look at a few other 
> bits for the grid, so then people can search for things in the virtual world, 
> and one thing I’m looking to introduce Is a sitemap style users system and 
> also land, I’m working on the schema for it, but it would look a lot like 
> sitemap schema, this is something I’m looking into making, as some of you 
> know the current sitemap schema is as follows
> <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9";>
> <url>
> <loc>https://www.example.com/something</loc>
> <priority>1.0</priority>
> <changefreq>daily</changefreq>
> <lastmod>2018-07-03</lastmod>
> </url>
> </urlset>
> And that it is has a maximum of 500 URL’s or 50MB in size, if it is larger it 
> is subset with a sitemap-index.xml which has the schema of 
> <sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9";>
> <sitemap>
> <loc>https://www.example.com/sitemap.xml</loc>
> <lastmod>2018-07-03</lastmod>
> </sitemap>
> </sitemapindex>
> 
> My proposal which I’m working on would follow this system loosely it would 
> have these as the base of the system, and would be easy to create them from 
> websites, I have yet to sort out the full proposal and wondered if the land 
> section could be implemented into opensim core its self (as there is no 
> profile for users with a web interface in the core, and a far as I can tell 
> there might not be which I understand), I am working on the schema at present 
> and will be looking to have a full proposal of the schema in the next few 
> days, I am hopeing to have both schemas done in the next few days. 
> Would this be something that can be implemented into opensim core so then it 
> would help the search engine which at present would be mine but could be 
> introduced into other search engines aswell, I am working on my search engine 
> as we speak and also the bot crawler, I will update everyone with the schema 
> and information on the schema soon. 
> 
> Alan Johnston

I'm not familiar enough to comment on specifics on the OpenSim side, but the 
idea you're talking about reminded me a great deal of some coursework I did at 
university about the semantic web; it's all XML based and intended for the kind 
of open data consumption you seem to be describing. In fact it was basically 
intended as a means of exposing raw data for search engines.

Unfortunately it hasn't really taken off in the way that was originally 
envisioned, as regular search engines got a lot better at inferring relations 
from data on web-pages, but the data formats and concepts might still be worth 
considering as a means of providing the data, rather than using sitemaps.

The Wikipedia article covers it all very well, and links to RDF and OWL (the 
main data formats) with good examples:
https://en.wikipedia.org/wiki/Semantic_Web 
<https://en.wikipedia.org/wiki/Resource_Description_Framework>

Anyway, like I say, it was just the first thing I thought of when I read what 
you wanted to do, because you mention having a specific search engine.

One advantage of sitemaps however is that, provided every URL has an actual 
web-page, then any existing search engine ought to be able index everything 
given a suitable sitemap as an entry point, but on the other hand, semantic 
data is intended to describe only what you define, so the added structure and 
formality may be a factor; i.e- a sitemap could embed a URL to anything inside 
it, but a semantic document would be invalid if it points to something it 
shouldn't. Semantic document do tend to be more verbose than sitemaps, but then 
they're not necessarily intended to be modified manually, and I assume your 
idea is to have OpenSim or a plugin generate the data?

Maybe I'm thinking about it too academically, but I thought I'd mention it. At 
the very least it's an interesting technology not a lot of people know about 
and which I like (despite hating the class that covered it) 😀

- Haravikk
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