User talk:DMacks
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Erich Clar page
I want to include a synthetic reaction that is known as Clar's reaction. It is of a certain class of cyclic ketones that condense with themselves when heated to 400 C in a mixture of zinc dust and zinc chloride.

I will add references and a description of what it is used for in synthesizing new polycyclic aromatic hydrocarbons.
Administrators' newsletter – March 2026
News and updates for administrators from the past month (February 2026).

- Following an RfC, the web archival service archive.today has been deprecated; links to the site should be removed.
- A request for comment is open to discuss retiring CSD criterion R3 in favour of handling such redirects through RfD.
- Following a motion, remedy 9.1 of the Conduct in deletion-related editing case has been amended to limit TenPoundHammer to one XfD nomination or PROD per 24-hour period.
- Following a motion, the Iskandar323 further POV pushing motion has been rescinded.
- The Arbitration Committee has passed a housekeeping motion rescinding a number of outdated remedies and enforcement provisions across multiple legacy cases. In most instances, existing sanctions remain in force and continue to be appealable through the usual processes, while some case-specific remedies were amended or clarified.
- Following the 2026 Steward Elections, the following editors have been appointed as stewards: A09, AmandaNP, Barras, Count Count, M7, SHB2000, Teles and VIGNERON.
- An Unreferenced articles backlog drive is taking place in March 2026 to reduce the backlog of articles tagged with {{Unreferenced}}. You can help reduce the backlog by adding citations to these articles. Sign up to participate!
pyrimidine dimer: move & categories
Dear DMacks,
I made recently an important modification in the article “Pyrimidine dimer”. I added sections on “photochemistry”, “optical properties”, “technological applications” and modified the introduction accordingly. I also wanted to slightly modify the title to “Pyrimidine dimers” because there are many different classes of such dimers, corresponding to at least 40 different chemical compounds. But when tried “move” I saw that I was not allowed to proceed to this modification. Moreover, I tried to change the categories to , , , , and . But it seems that in this article there are hidden categories and I failed to do the change. I would greatly appreciate if you could help me with these two issues. Thank you in advance Sincerely, Serbacc (talk) 09:00, 2 March 2026 (UTC)
pyrimidine dimer:categories
Dear DMacks, As the "categories disappeared in my previous message, I send them again: Nucleic acids, Photochemistry, Mutation, Melanoma, Smart materials. Thank you Serbacc (talk) 17:38, 2 March 2026 (UTC)
Tech News: 2026-10
Latest tech news from the Wikimedia technical community. Please tell other users about these changes. Not all changes will affect you. Translations are available.
Weekly highlight
- Wikipedia 25 Birthday mode is now live on Betawi, Breton, Chinese, Czech, Dutch, English, French, Gorontalo, Indonesian, Italian, Luxembourgish, Madurese, Sicilian, Spanish, Thai, and Vietnamese Wikipedias! This limited-time campaign feature celebrates 25 years of Wikipedia with a birthday mascot, Baby Globe. When turned on, Baby Globe is shown on ~2,500 articles, waiting to be discovered by readers. Communities can choose to turn Birthday mode on by getting consensus from their community and asking an admin to enable the feature and customize it via community configuration on the local wiki.
Updates for editors
- Sub-referencing, a new feature to re-use references with different details has been released to Swedish Wikipedia, Polish Wikipedia and a couple of other wikis. You can try the feature on these projects or on testwiki and betawiki. Learnings from the first pilot wiki German Wikipedia have been published in a report. Reach out to the Wikimedia Deutschland team if you are interested in becoming a pilot wiki.
- Paste Check will become available at all Wikipedias this week. The feature prompts newcomers who are pasting text they are not likely to have written into VisualEditor to consider whether doing so risks a copyright violation. Paste Check tags all edits where it is shown for potential review. Local administrators can configure various aspects of the feature via Special:EditChecks. Research across 22 wikis found that Paste Check resulted in an 18% decrease in relative reverted-edits compared to the control group. Translators can help to localize this and related features.
- The Reader Experience team will be standardizing the user menu in the top right for all mobile users so that it is closer to the desktop experience. Currently this user menu is only visible to users with Advanced Mobile Controls (AMC) turned on. The only change is that a couple buttons previously in the left-side menu will move to the top right for users who do not have AMC turned on. This change is expected to go out March 9 and seeks to improve the user interface.
- Starting in the week of March 2, the emails sent out when an email address was added, removed, or changed for an account will switch to a substantially nicer and clearer HTML email from the prior plaintext one.
- Notifications are currently limited to 2,000 historic entries per user, and extend back to 2013 when the feature was released. This is going to be changed to only store Notifications from the last 5 years, but up to 10,000 of them. This will help with long-term infrastructure health and help to prevent more recent notifications from disappearing too soon.
- The Global Watchlist which lets you view your watchlists from multiple wikis on a single page continues to see improvements. The latest update improves label usage experience. The extension now allows activating the language fallback system for Wikidata items without labels in the viewed language, and showing those labels in the user’s preferred Wikidata language if no
uselang=URL parameter is provided. - The Wikipedia Android team has started a beta test of hybrid search on Greek Wikipedia. Hybrid search capabilities can handle both semantic and keyword queries enabling readers to find what they’re looking for directly on Wikipedia more easily.
- For security reasons, members of certain user groups are required to have two-factor authentication (2FA) enabled. Currently, 2FA is required to use the group, but not to be a member of it. Given that this model still has some vulnerabilities, the situation will gradually change in March. Members of these groups will be unable to disable last 2FA method on their account, and it will be impossible to add users without 2FA to these groups. Users will still be able to add new authentication methods or remove them, as long as at least one method is continuously enabled. In the second half of March, users without 2FA will be removed from these groups. This applies to: CentralNotice administrators, checkusers, interface administrators, suppressors, Wikidata staff, Wikifunctions staff, WMF Office IT and WMF Trust & Safety. Nothing will change for other users. See the linked task for deployment schedule.
View all 27 community-submitted tasks that were resolved last week. For example, the issue preventing users from creating an instance in Wikibase.cloud has now been fixed.
Updates for technical contributors
- To help ensure fair use of infrastructure, over the next month the Wikimedia Foundation will implement global API rate limits across our APIs. In early March, stricter limits will be applied to unidentified requests from outside Toolforge/WMCS and API requests that are made from web browsers. In April, higher limits will be applied to identified traffic. These limits are intentionally set as high as possible to minimise impact on the community. Bots running in Toolforge/WMCS or with the bot user right on any wiki should not be affected for now. However, all developers are advised to follow updated best practices. For more information, see Wikimedia APIs/Rate limits.
- The Wikidata Query Service Linked Data Fragment (LDF) endpoint will be decommissioned in February. This endpoint served limited traffic, which was successfully migrated to other data access methods that were better suited to support existing use cases. The hardware used to support the LDF endpoint will be reallocated to support the ongoing backend migration efforts.
- The new Parsoid parser continues to be deployed to additional wikis, improving platform sustainability and making it easier to introduce new reading and editing features. Parsoid is now the default parser on 488 WMF wikis (268 Wikipedias), now covering more than 10% of all Wikipedia page views.
- The process and criteria for requesting exceptional access to the high volume feed of the Wikimedia Enterprise APIs (at no cost for mission-aligned usecases), have now been published. This is to provide more thorough and clearer documentation for users.
- Tech Blog, the blog dedicated to the Wikimedia technical community will be migrating to Diff, the community news and event blog. The migration should be complete in April 2026, after which new posts will be accepted for publishing. Readers will be able to access posts – old and new – on the landing page at https://diff.wikimedia.org/techblog.
Detailed code updates later this week: MediaWiki
Tech news prepared by Tech News writers and posted by bot • Contribute • Translate • Get help • Give feedback • Subscribe or unsubscribe.
MediaWiki message delivery 17:49, 2 March 2026 (UTC)
Healthcare in Netherlands
Thanks for reverting that addition - moments before I hit the submit button on my reversion, lol. I also suggested WP:AITELLS in my edit summary. Have reverted several of their other contributions. Brand-new editor with picture perfect additions that take liberties with the provided sources. Sigh. cheers. anastrophe, an editor he is. 19:05, 4 March 2026 (UTC)
...rolls
Tech News: 2026-11
Latest tech news from the Wikimedia technical community. Please tell other users about these changes. Not all changes will affect you. Translations are available.
Weekly highlight
- All wikis will be read-only for a few minutes on Wednesday, 25 March 2026 at 15:00 UTC. This is for the datacenter server switchover backup tests, which happen twice a year. During the switchover, all Wikimedia website traffic is shifted from one primary data center to the backup data center to test availability and prevent service disruption even in emergencies.
- Last week, all wikis had 2 hours of read-only time, and extended unavailability for user-scripts and gadgets. This was due to a security incident which has since been resolved. Work is ongoing to prevent re-occurrences. For current information please see the post on the Stewards' noticeboard (translations).
Updates for editors
- Users facing multiple blocks on mobile will now see the reasons for each block separately, instead of a generic message. This helps them understand why they are blocked and what steps they can take to resolve the issue. For example, users affected for using common VPNs (such as iCloud Private Relay) will receive clearer guidance on what they need to do to start editing again.
- Later this week, Suggestion Mode will become available as a beta feature within the visual editor at all Wikipedias. This feature proactively suggests various types of actions that people can consider taking to improve Wikipedia articles, and learn about related guidelines. The feature is locally configurable, and can also be locally expanded with custom Suggestions. Current settings can be seen at Special:EditChecks and there are instructions for how administrators can customize the links to point to local guidelines. The feature is connected to Edit check which suggests improvements while someone is writing new content. In the future, the Editing team plans to evaluate the feature's impact with newcomers through a controlled experiment.
View all 23 community-submitted tasks that were resolved last week. For example, the issue where the cursor became misaligned during the use of CodeMirror’s syntax highlighting, which makes wikitext and code easier to read, has now been fixed. This problem specifically affected users who defined a font rule in a custom stylesheet while creating a new topic with DiscussionTools.
Updates for technical contributors
- API rate limiting update: To help ensure fair use of infrastructure, global API rate limits will be applied this week to requests without a compliant User-Agent that originate from outside Toolforge/WMCS and to unauthenticated requests made from web browsers. Higher limits will be applied to identified traffic in April. Bots running in Toolforge/WMCS or with the bot user right on any wiki should not be affected for now. However, all developers are advised to follow updated best practices. For more information, see Wikimedia APIs/Rate limits.
- The new GraphQL API has been released. The API was developed as a flexible alternative to select features of the Wikidata Query Service (WDQS), to improve developer experience and foster adaptability, and efficient data access. Try it out and give feedback. You can also sign up for usability tests.
- The PTAC Unsupported Tools Working Group continued improvements to Video2Commons in February, with fixes addressing authentication errors, large-file handling, task queue visibility, and clearer upload behavior. Work is still ongoing in some areas, including changes related to deprecated server-side uploads. Read this update to learn more.
Detailed code updates later this week: MediaWiki
In depth
- The Article Guidance team invites experienced Wikipedia editors from selected pilot wikis and interested contributors from other Wikipedias to fill out this questionnaire which is available in English, Arabic, Bengali, Japanese, Portuguese, Persian, and Turkish. Your answers will help the team customize guidance for less experienced editors and help them learn community policies and practices while creating an article. Learn more on the project page.
Tech news prepared by Tech News writers and posted by bot • Contribute • Translate • Get help • Give feedback • Subscribe or unsubscribe.
MediaWiki message delivery 18:51, 9 March 2026 (UTC)
O-Nitroanisole
MegaCon
If youre removing locations, many other convention pages have that too like New York Comic Con and San Diego Comic Con. The page has been tabled like this for almost 10 years as I add to it info about past shows. Most of the building locations you removed have sources but some dont and I can get to fixing that. As for last section, I agree it could be improved to read less like a guide and more like an overview in retrospect. Its seperated for ease of navigation and comic/VA guests hidden to prevent over need of scrolling. ShadowDragon343 (talk) 17:59, 11 March 2026 (UTC)