Tech history on this day (Timeline)

On its date, a milestone of technology and engineering: a first, a launch, an invention.

Feed id	`fd_76dd692213d9`
Type	Evergreen: Written once with AI, reviewed by a person, released on a schedule. Not news.
Plans	Every plan
Source	`tech-explained`
Markets	Tech and industry
Schedule	Daily 07:00
Template	Timeline, in whichever of its 9 visual variants a channel chooses when it adds the feed
Shapes	9x16, 4x5, 1x1, 16x9, 2x3
Languages	Any: translated by AI into the language each channel chooses
Freshness	An event older than 24 hours is kept but never published

Example video

The 1x1 cut of this feed's example, drawn in the Swiss grid variant with an example brand. A channel draws it in the variant it chose and in its own brand. Open the video on its own.

Use cases

Release notes and product updates, published the day they ship.
Engineering or production figures as a weekly or monthly story with its numbers.
Trade fair and event countdowns for sales and partner channels.

What it carries

A line of years with up to five eras laid on it and two to eight milestones: a marker travels the line from milestone to milestone, each popping up with its year, title, line and a picture where one is sent, and the clip ends on every milestone listed under the line. metaData is the post's title, descriptions and hashtags and is never drawn.

Field	Type	Required	Limit	What it is
`clipData`	group	yes		Clip data: Everything drawn: a kicker, the title, the span of years, the eras, two to eight milestones with their pictures, the source and the look.
`clipData.kicker`	text		up to 20 characters	Kicker: A word above the title, such as OUR STORY or 50 YEARS.
`clipData.title`	text	yes	up to 80 characters	Title: What the timeline tells. Shown above the line the whole time.
`clipData.from`	integer	yes		First year: Where the line of years starts. A milestone outside the span widens it.
`clipData.to`	integer	yes		Last year: Where the line of years ends. At the end of the clip the marker runs on to it.
`clipData.eras`	list		up to 5	Eras: Up to five periods laid on the line as bands, each with its name over it. The era the marker is in is lit, and each milestone's card names its era.
`clipData.eras[]`	group			Era
`clipData.eras[].name`	text	yes	up to 24 characters	Name
`clipData.eras[].from`	integer	yes		From: The year the era starts.
`clipData.eras[].to`	integer	yes		To: The year the era ends.
`clipData.milestones`	list	yes	at least 2, up to 8	Milestones: Two to eight moments, each shown in turn as the marker reaches it, with its year, a title, a line and a picture where one is sent, then all of them listed at the end. They are put in the order of their years for you. Each adds a little over three seconds, so eight run about 31 seconds.
`clipData.milestones[]`	group			Milestone
`clipData.milestones[].year`	integer	yes		Year
`clipData.milestones[].title`	text	yes	up to 40 characters	Title: What happened, in a few words.
`clipData.milestones[].line`	text		up to 100 characters	Line: One or two sentences on what happened.
`clipData.milestones[].picture`	image		`media://` file from the media library, alt text up to 120 characters	Picture: A picture from the media library, shown with the milestone and fitted to its frame as Picture fit says. A milestone without one shows its words larger.
`clipData.pictureFit`	enum		`auto`, `fill`, `whole`	Picture fit: Automatic, the default, fills the frame when a picture is close to its shape and shows it whole when filling would cut off more than a sixth of it, so no picture is cropped away. Fill the frame always crops to the frame, right for photographs; Show it whole never crops, right for logos and cut-out products.
`clipData.pictureFocus`	enum		`centre`, `top`, `bottom`, `left`, `right`	Picture focus: Which part of a picture stays in view when it fills its frame and its edges are cropped: the middle, or one side.
`clipData.source`	text		up to 70 characters	Source: Where the dates come from, shown small at the foot. Drawn exactly as written: write its label too, such as Source: at the start, as the template adds no word of its own.
`clipData.styleWords`	group			Style words: The few words some styles write into their own frame, each drawn exactly as written, in the language you write it in. A word left out is not drawn: no template adds a word of its own. The same keys in every format of the collections; each style draws only its own.
`clipData.styleWords.live`	text		up to 16 characters	Live marker (Broadcast news): Written beside the light in Broadcast news' channel bug, such as LIVE. Left out, the light stands alone.
`clipData.styleWords.byline`	text		up to 12 characters	Byline (Editorial): Written before the presenter's name in Editorial, such as By. Left out, the name stands alone.
`clipData.styleWords.functionKeys`	list		up to 4	Function keys (Data terminal): Data terminal's row of keys F1 to F4, one word each, in order, such as HELP, DATA, CHART and NEWS; the second is drawn held down, and a key that does not fit the row is left out. Left out, no keys are drawn.
`clipData.styleWords.functionKeys[]`	text		up to 12 characters	Key
`clipData.styleWords.commandKey`	text		up to 10 characters	Command key (Data terminal): The key at the end of Data terminal's row, in the rise colour, such as GO. Left out, none is drawn.
`clipData.styleWords.realTime`	text		up to 12 characters	Real-time light (Data terminal): Written beside the blinking light in Data terminal's status bar, such as RT. Left out, the light stands alone.
`clipData.styleWords.messageLabel`	text		up to 12 characters	Message window label (Data terminal): The tab on Data terminal's message window round the presenter, such as MSG. Left out, the window has no tab.
`clipData.styleWords.pictureLabel`	text		up to 12 characters	Picture panel label (Data terminal): Written in the strip along the top of Data terminal's picture panels, such as IMG. Left out, the strip stays empty.
`clipData.look`	group			Look: How the clip looks and moves within its style. The same switches in every format of the collections. Leave a switch out, or set it to the style's own, and the style decides.
`clipData.look.theme`	enum		`auto`, `brand`, `light`, `dark`, `bold`	Theme: The style's own choice; your brand's own colours and background; a light or dark page tinted with your brand colour; or your brand colour as the page.
`clipData.look.pace`	enum		`auto`, `calm`, `standard`, `punchy`	Pace: How things arrive: the style's own rhythm, calm fades, a standard rhythm, or punchy slams and cuts.
`clipData.look.corners`	enum		`auto`, `square`, `soft`, `round`	Corners: The shape of cards, panels and marks.
`clipData.look.align`	enum		`auto`, `start`, `centre`	Text alignment: Where the text lines up.
`clipData.look.logo`	enum		`auto`, `free`	Logo: The style's own: the logo on the style's plate (a card, a disc, a badge) so it reads on any page. As it is: the logo whole, with no plate, frame or crop, for a logo made to stand on the page, such as one with a transparent background. As it is, make sure your logo reads on the page of the theme you choose.
`clipData.look.logoSize`	enum		`auto`, `small`, `large`	Logo size: Standard is the style's own size. Small draws the logo a fifth smaller, with its plate. Large draws it a quarter larger wherever the style has room for it, and at the standard size where it has none.
`clipData.look.hideHeader`	boolean			Hide logo and title: Leaves out the line at the top of the clip: your logo, the title line and the style's decoration around them, so the content starts at the top. To leave it out of every clip, switch Logo and title line off in your brand's settings.
`clipData.look.hideFooter`	boolean			Hide footer line: Leaves out your footer line at the foot of the clip, with whatever the style draws only to carry it, so the content reaches further down. Your presenter and the source line stay. To leave it out of every clip, switch Footer line off in your brand's settings.
`clipData.look.pattern`	enum		`auto`, `none`, `dots`, `grid`, `lines`	Background pattern: The fine texture behind the content. The style's own keeps what the style draws there, and some styles draw none. None leaves the background plain. Dots, Grid and Diagonal lines draw that pattern faintly instead, the same in every style, in the colour of your page.
`metaData`	group			Meta data: Everything about the post that is never drawn in the clip: its title, its description in four lengths, one per kind of platform, and its hashtags. Reelwire adds the brand's description, link and hashtags after it. Left out, the post text is generated from the clip data.
`metaData.title`	text		up to 100 characters	Title: Used where the platform has a title of its own: Facebook Feed, LinkedIn, Pinterest and YouTube. Up to 100 characters, which every one of them takes.
`metaData.captionTiny`	text		up to 200 characters	Tiny description (Pinterest, Threads, X): Up to 200 characters. The brand's description, link and hashtags follow it within the platform's limit.
`metaData.captionShort`	text		up to 500 characters	Short description (Telegram, Threema, WeChat, WhatsApp): Up to 500 characters. The brand's description, link and hashtags follow it within the platform's limit.
`metaData.captionMedium`	text		up to 1500 characters	Medium description (Discord, Facebook Reels, Instagram, LinkedIn, Signal, Slack, TikTok): Up to 1500 characters. The brand's description, link and hashtags follow it within the platform's limit.
`metaData.captionLong`	text		up to 4000 characters	Long description (Facebook Feed, YouTube): Up to 4000 characters. The brand's description, link and hashtags follow it within the platform's limit.
`metaData.hashtags`	list		up to 15	Hashtags: Written without the #. Up to 15, which every platform takes.
`metaData.hashtags[]`	text		up to 60 characters	Hashtag

locales carries other languages: under each language code, the parts of clipData and metaData that differ, laid over the default, so a language with no copy still renders.

A picture is always a file from your media library: media:// followed by its id or its name. Anything the table does not list is refused, and so is anything over its limit, with a 400 schema_validation error that names the field.

Ask Reelwire for the whole JSON Schema, the document this feed is checked against, without signing in:

curl "https://app.reelwire.io/v1/formats/feed/fd_76dd692213d9"

Which template draws a feed is Reelwire's decision and can change, so a producer asks by the feed, as above, rather than by its template.

Delivery JSON

Every event of this feed is delivered to Reelwire in this envelope. You do not send it yourself: add the feed to a channel under Ready-made feeds, and each event becomes a post on that channel. data is the document described above.

{
  "eventId": "01M2SQMKK3G1NVFXV31DCBVB95",
  "occurredAt": "2026-09-23T07:00:00Z",
  "feedId": "fd_76dd692213d9",
  "locale": "en",
  "data": {
    "clipData": {
      "kicker": "50 years",
      "title": "From a church hall to a city landmark: fifty years of the Millbrook Arts Centre",
      "from": 1976,
      "to": 2026,
      "eras": [
        {
          "to": 1991,
          "from": 1976,
          "name": "The church hall"
        },
        {
          "to": 2014,
          "from": 1991,
          "name": "The old mill"
        },
        {
          "to": 2026,
          "from": 2014,
          "name": "Mill and quay"
        }
      ],
      "milestones": [
        {
          "line": "In a rented church hall they print with ink dropped into water, and 400 people see the first show.",
          "year": 1976,
          "title": "Twelve painters open a studio",
          "picture": {
            "alt": "Clouds of red and blue ink in water",
            "url": "media://example-image.png"
          }
        },
        {
          "line": "The centre buys the empty mill by the river, with room for three galleries, a cafe and a print room.",
          "year": 1991,
          "title": "A home in the old grain mill"
        },
        {
          "line": "Artists who paint on screens get a prize of their own, and the winning works light up the mill.",
          "year": 2003,
          "title": "The first digital art prize",
          "picture": {
            "alt": "Soft waves of blue, violet and orange",
            "url": "media://example-image.jpg"
          }
        },
        {
          "line": "Every primary school in the city brings its classes for a day of painting, paid for by the centre.",
          "year": 2009,
          "title": "A free day for every school"
        },
        {
          "line": "A new hall beside the mill doubles the space and shows the city's collection of landscapes.",
          "year": 2014,
          "title": "A glass gallery on the quay",
          "picture": {
            "alt": "Hills under an evening sky, drawn in layers",
            "url": "media://example-image.svg"
          }
        },
        {
          "line": "For the anniversary every room is free all year, with a show of work from each of the fifty years.",
          "year": 2026,
          "title": "Fifty years, free for everyone"
        }
      ],
      "pictureFit": "auto",
      "pictureFocus": "centre",
      "source": "Source: Millbrook Arts Centre archive",
      "styleWords": {
        "live": "LIVE",
        "byline": "By",
        "functionKeys": [
          "HELP",
          "DATA",
          "CHART",
          "NEWS"
        ],
        "commandKey": "GO",
        "realTime": "RT",
        "messageLabel": "MSG",
        "pictureLabel": "IMG"
      },
      "look": {
        "theme": "auto",
        "pace": "auto",
        "corners": "auto",
        "align": "auto",
        "logo": "auto",
        "logoSize": "auto",
        "hideHeader": false,
        "hideFooter": false,
        "pattern": "auto"
      }
    },
    "metaData": {
      "title": "Fifty years of the Millbrook Arts Centre, from a church hall to the quay",
      "captionTiny": "The Millbrook Arts Centre turns fifty. Six moments from its story, from twelve painters in a church hall in 1976 to a year of free entry for the anniversary.",
      "captionShort": "The Millbrook Arts Centre turns fifty. It began in 1976, when twelve painters rented a church hall and printed with ink dropped into water. In 1991 it moved into the old grain mill by the river, in 2003 it gave the first prize for digital art, and since 2009 every primary school in the city has spent a free day there. A glass gallery on the quay opened in 2014, and this year every room is free.",
      "captionMedium": "The Millbrook Arts Centre turns fifty this year, and its story fits on one line of years. It began in 1976, when twelve painters rented a church hall and printed with ink dropped into still water; four hundred people came to see the first show. In 1991 the centre bought the empty grain mill by the river, with room for three galleries, a cafe and a print room. In 2003 it gave its first prize for digital art, and the winning works were shown in the mill's windows. Since 2009 every primary school in the city has brought its classes for a free day of painting, paid for by the centre. In 2014 a glass gallery opened on the quay beside the mill, doubling the space and giving the city's collection of landscapes a home. For the anniversary every room is free all year, with a show of work from each of the fifty years. The names and dates in this clip are illustrative.",
      "captionLong": "The Millbrook Arts Centre turns fifty this year, and its story fits on one line of years. It began in 1976, when twelve painters rented a church hall and printed with ink dropped into still water, a technique one of them had brought back from a summer course; four hundred people came to see the first show in its first week. For fifteen years the church hall was the centre: classes in the evenings, a show every season, and a print room in the vestry. In 1991 the centre bought the empty grain mill by the river, with room for three galleries, a cafe and a larger print room, and the number of visitors doubled within two years. In 2003 it gave its first prize for digital art, for artists who paint on screens, and the winning works were shown in the mill's windows every evening that winter. Since 2009 every primary school in the city has brought its classes for a free day of painting, paid for by the centre and its members. In 2014 a glass gallery opened on the quay beside the mill, doubling the space and giving the city's collection of landscapes a permanent home. For the anniversary every room is free all year, with a show of work from each of the fifty years, chosen by the people who made and saw it. The centre's archive of posters, catalogues and photographs is open on the first Saturday of every month. The names and dates in this clip are illustrative.",
      "hashtags": [
        "art",
        "gallery",
        "history",
        "anniversary",
        "culture"
      ]
    }
  }
}

feedId names this feed and never changes, even when the feed is renamed. eventId is set once per event, so an event delivered twice is published once. occurredAt is when it happened, which is what the freshness limit is measured from.

Example video​

Use cases​

What it carries​

Delivery JSON​

Example video

Use cases

What it carries

Delivery JSON