Repository files navigation

VCS Extension Specification

This document explains the VCS Extension to the SpatioTemporal Asset Catalog (STAC) specification.

It describes a version control system (VCS) reference, e.g. the Git repository, branch or commit that a catalog or an application originates from. It is typically used on a link with the vcs relation type (see the Application Extension).

Fields

The fields in the table below can be used in these parts of STAC documents:

  • Catalogs
  • Collections
  • Item Properties (incl. Summaries in Collections)
  • Assets (for both Collections and Items, incl. Item Asset Definitions in Collections and Asset Templates)
  • Links (incl. Link Templates)
  • Bands
Field NameTypeDescription
vcs:typestringThe type of version control system, e.g. git.
vcs:branchstringThe branch, e.g. main.
vcs:commitstringThe commit hash.
vcs:tagstringThe tag, e.g. v1.0.0.

At least one of the fields must be provided where the extension is used.

Contributing

All contributions are subject to the STAC Specification Code of Conduct. For contributions, please follow the STAC specification contributing guide Instructions for running tests are copied here for convenience.

Running tests

The same checks that run as checks on PRs are part of the repository and can be run locally to verify that changes are valid. To run tests locally, you'll need npm, which is a standard part of any node.js installation.

First you'll need to install everything with npm once. Just navigate to the root of this repository and on your command line run:

npm install

Then to check markdown formatting and test the examples against the JSON schema, you can run:

npm test

This will spit out the same texts that you see online, and you can then go and fix your markdown or examples.

If the tests reveal formatting problems with the examples, you can fix them with:

npm run format-examples

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all
 blocks
(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
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VCS Extension Specification

This document explains the VCS Extension to the SpatioTemporal Asset Catalog (STAC) specification.

It describes a version control system (VCS) reference, e.g. the Git repository, branch or commit that a catalog or an application originates from. It is typically used on a link with the vcs relation type (see the Application Extension).

Fields

The fields in the table below can be used in these parts of STAC documents:

  • Catalogs
  • Collections
  • Item Properties (incl. Summaries in Collections)
  • Assets (for both Collections and Items, incl. Item Asset Definitions in Collections and Asset Templates)
  • Links (incl. Link Templates)
  • Bands
Field NameTypeDescription
vcs:typestringThe type of version control system, e.g. git.
vcs:branchstringThe branch, e.g. main.
vcs:commitstringThe commit hash.
vcs:tagstringThe tag, e.g. v1.0.0.

At least one of the fields must be provided where the extension is used.

Contributing

All contributions are subject to the STAC Specification Code of Conduct. For contributions, please follow the STAC specification contributing guide Instructions for running tests are copied here for convenience.

Running tests

The same checks that run as checks on PRs are part of the repository and can be run locally to verify that changes are valid. To run tests locally, you'll need npm, which is a standard part of any node.js installation.

First you'll need to install everything with npm once. Just navigate to the root of this repository and on your command line run:

npm install

Then to check markdown formatting and test the examples against the JSON schema, you can run:

npm test

This will spit out the same texts that you see online, and you can then go and fix your markdown or examples.

If the tests reveal formatting problems with the examples, you can fix them with:

npm run format-examples

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Force GitHub README to respect dark mode (function() { var style = document.createElement('style'); style.textContent = ' .markdown-body { color-scheme: dark light; } .markdown-body pre { background: #161b22 !important; } .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; } .markdown-body table th, .markdown-body table td { border-color: #30363d !important; } .markdown-body img { background: #0d1117; } .markdown-body blockquote { border-left-color: #8b949e; } .markdown-body hr { border-color: #30363d; } '; document.head.appendChild(style); })(); } } catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
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VCS Extension Specification

This document explains the VCS Extension to the SpatioTemporal Asset Catalog (STAC) specification.

It describes a version control system (VCS) reference, e.g. the Git repository, branch or commit that a catalog or an application originates from. It is typically used on a link with the vcs relation type (see the Application Extension).

Fields

The fields in the table below can be used in these parts of STAC documents:

  • Catalogs
  • Collections
  • Item Properties (incl. Summaries in Collections)
  • Assets (for both Collections and Items, incl. Item Asset Definitions in Collections and Asset Templates)
  • Links (incl. Link Templates)
  • Bands
Field NameTypeDescription
vcs:typestringThe type of version control system, e.g. git.
vcs:branchstringThe branch, e.g. main.
vcs:commitstringThe commit hash.
vcs:tagstringThe tag, e.g. v1.0.0.

At least one of the fields must be provided where the extension is used.

Contributing

All contributions are subject to the STAC Specification Code of Conduct. For contributions, please follow the STAC specification contributing guide Instructions for running tests are copied here for convenience.

Running tests

The same checks that run as checks on PRs are part of the repository and can be run locally to verify that changes are valid. To run tests locally, you'll need npm, which is a standard part of any node.js installation.

First you'll need to install everything with npm once. Just navigate to the root of this repository and on your command line run:

npm install

Then to check markdown formatting and test the examples against the JSON schema, you can run:

npm test

This will spit out the same texts that you see online, and you can then go and fix your markdown or examples.

If the tests reveal formatting problems with the examples, you can fix them with:

npm run format-examples

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Highlight search terms from Google/DuckDuckGo/Bing referrer (function() { var ref = document.referrer; var terms = []; if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) { var url = new URL(ref); var q = url.searchParams.get('q') || url.searchParams.get('p'); if (q) { terms = q.split(/\s+/).filter(function(t) { return t.length > 2; }); } } if (terms.length === 0) return; var style = document.createElement('style'); style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }'; document.head.appendChild(style); function highlight(node) { if (node.nodeType === 3) { // text node var text = node.textContent; var found = false; terms.forEach(function(term) { var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi'); if (regex.test(text)) { found = true; var frag = document.createDocumentFragment(); var parts = text.split(regex); parts.forEach(function(part, i) { if (i % 2 === 0) { frag.appendChild(document.createTextNode(part)); } else { var span = document.createElement('span'); span.className = 'userscript-highlight'; span.textContent = part; frag.appendChild(span); } }); node.parentNode.replaceChild(frag, node); } }); } else if (node.nodeType === 1 && node.childNodes) { // element var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT']; if (!skipTags.includes(node.tagName)) { Array.from(node.childNodes).forEach(highlight); } } } highlight(document.body); // Re-highlight on dynamic content var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1 || node.nodeType === 3) highlight(node); }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
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Repository files navigation

VCS Extension Specification

This document explains the VCS Extension to the SpatioTemporal Asset Catalog (STAC) specification.

It describes a version control system (VCS) reference, e.g. the Git repository, branch or commit that a catalog or an application originates from. It is typically used on a link with the vcs relation type (see the Application Extension).

Fields

The fields in the table below can be used in these parts of STAC documents:

  • Catalogs
  • Collections
  • Item Properties (incl. Summaries in Collections)
  • Assets (for both Collections and Items, incl. Item Asset Definitions in Collections and Asset Templates)
  • Links (incl. Link Templates)
  • Bands
Field NameTypeDescription
vcs:typestringThe type of version control system, e.g. git.
vcs:branchstringThe branch, e.g. main.
vcs:commitstringThe commit hash.
vcs:tagstringThe tag, e.g. v1.0.0.

At least one of the fields must be provided where the extension is used.

Contributing

All contributions are subject to the STAC Specification Code of Conduct. For contributions, please follow the STAC specification contributing guide Instructions for running tests are copied here for convenience.

Running tests

The same checks that run as checks on PRs are part of the repository and can be run locally to verify that changes are valid. To run tests locally, you'll need npm, which is a standard part of any node.js installation.

First you'll need to install everything with npm once. Just navigate to the root of this repository and on your command line run:

npm install

Then to check markdown formatting and test the examples against the JSON schema, you can run:

npm test

This will spit out the same texts that you see online, and you can then go and fix your markdown or examples.

If the tests reveal formatting problems with the examples, you can fix them with:

npm run format-examples

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Strip utm_, fbclid, gclid, etc. from all links on page (function() { var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid', 'ref', 'ref_src', 'source', 'medium', 'campaign']; function cleanUrl(url) { try { var u = new URL(url, window.location.origin); var changed = false; trackingParams.forEach(function(p) { if (u.searchParams.has(p)) { u.searchParams.delete(p); changed = true; } }); return changed ? u.toString() : url; } catch (e) { return url; } } function cleanLinks() { document.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } cleanLinks(); var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1) { if (node.tagName === 'A') cleanLinks(); node.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + '
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Repository files navigation

VCS Extension Specification

This document explains the VCS Extension to the SpatioTemporal Asset Catalog (STAC) specification.

It describes a version control system (VCS) reference, e.g. the Git repository, branch or commit that a catalog or an application originates from. It is typically used on a link with the vcs relation type (see the Application Extension).

Fields

The fields in the table below can be used in these parts of STAC documents:

  • Catalogs
  • Collections
  • Item Properties (incl. Summaries in Collections)
  • Assets (for both Collections and Items, incl. Item Asset Definitions in Collections and Asset Templates)
  • Links (incl. Link Templates)
  • Bands
Field NameTypeDescription
vcs:typestringThe type of version control system, e.g. git.
vcs:branchstringThe branch, e.g. main.
vcs:commitstringThe commit hash.
vcs:tagstringThe tag, e.g. v1.0.0.

At least one of the fields must be provided where the extension is used.

Contributing

All contributions are subject to the STAC Specification Code of Conduct. For contributions, please follow the STAC specification contributing guide Instructions for running tests are copied here for convenience.

Running tests

The same checks that run as checks on PRs are part of the repository and can be run locally to verify that changes are valid. To run tests locally, you'll need npm, which is a standard part of any node.js installation.

First you'll need to install everything with npm once. Just navigate to the root of this repository and on your command line run:

npm install

Then to check markdown formatting and test the examples against the JSON schema, you can run:

npm test

This will spit out the same texts that you see online, and you can then go and fix your markdown or examples.

If the tests reveal formatting problems with the examples, you can fix them with:

npm run format-examples

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Auto-enable theater mode on YouTube (function() { function tryTheater() { var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]'); if (btn && !btn.classList.contains('activated')) { btn.click(); } } // Try immediately tryTheater(); // Try after navigation (SPA) var lastUrl = location.href; setInterval(function() { if (location.href !== lastUrl) { lastUrl = location.href; setTimeout(tryTheater, 500); } }, 1000); // Also try on player load var observer = new MutationObserver(tryTheater); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
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VCS Extension Specification

This document explains the VCS Extension to the SpatioTemporal Asset Catalog (STAC) specification.

It describes a version control system (VCS) reference, e.g. the Git repository, branch or commit that a catalog or an application originates from. It is typically used on a link with the vcs relation type (see the Application Extension).

Fields

The fields in the table below can be used in these parts of STAC documents:

  • Catalogs
  • Collections
  • Item Properties (incl. Summaries in Collections)
  • Assets (for both Collections and Items, incl. Item Asset Definitions in Collections and Asset Templates)
  • Links (incl. Link Templates)
  • Bands
Field NameTypeDescription
vcs:typestringThe type of version control system, e.g. git.
vcs:branchstringThe branch, e.g. main.
vcs:commitstringThe commit hash.
vcs:tagstringThe tag, e.g. v1.0.0.

At least one of the fields must be provided where the extension is used.

Contributing

All contributions are subject to the STAC Specification Code of Conduct. For contributions, please follow the STAC specification contributing guide Instructions for running tests are copied here for convenience.

Running tests

The same checks that run as checks on PRs are part of the repository and can be run locally to verify that changes are valid. To run tests locally, you'll need npm, which is a standard part of any node.js installation.

First you'll need to install everything with npm once. Just navigate to the root of this repository and on your command line run:

npm install

Then to check markdown formatting and test the examples against the JSON schema, you can run:

npm test

This will spit out the same texts that you see online, and you can then go and fix your markdown or examples.

If the tests reveal formatting problems with the examples, you can fix them with:

npm run format-examples

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Remove or un-stick sticky/fixed headers that block content (function() { function unstick() { document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) { if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') { el.style.position = 'static'; el.style.top = 'auto'; el.style.zIndex = 'auto'; } }); } unstick(); var observer = new MutationObserver(unstick); observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] }); })(); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
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Repository files navigation

VCS Extension Specification

This document explains the VCS Extension to the SpatioTemporal Asset Catalog (STAC) specification.

It describes a version control system (VCS) reference, e.g. the Git repository, branch or commit that a catalog or an application originates from. It is typically used on a link with the vcs relation type (see the Application Extension).

Fields

The fields in the table below can be used in these parts of STAC documents:

  • Catalogs
  • Collections
  • Item Properties (incl. Summaries in Collections)
  • Assets (for both Collections and Items, incl. Item Asset Definitions in Collections and Asset Templates)
  • Links (incl. Link Templates)
  • Bands
Field NameTypeDescription
vcs:typestringThe type of version control system, e.g. git.
vcs:branchstringThe branch, e.g. main.
vcs:commitstringThe commit hash.
vcs:tagstringThe tag, e.g. v1.0.0.

At least one of the fields must be provided where the extension is used.

Contributing

All contributions are subject to the STAC Specification Code of Conduct. For contributions, please follow the STAC specification contributing guide Instructions for running tests are copied here for convenience.

Running tests

The same checks that run as checks on PRs are part of the repository and can be run locally to verify that changes are valid. To run tests locally, you'll need npm, which is a standard part of any node.js installation.

First you'll need to install everything with npm once. Just navigate to the root of this repository and on your command line run:

npm install

Then to check markdown formatting and test the examples against the JSON schema, you can run:

npm test

This will spit out the same texts that you see online, and you can then go and fix your markdown or examples.

If the tests reveal formatting problems with the examples, you can fix them with:

npm run format-examples

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Universal Dark Mode - works on any site (function() { var enabled = true; function applyDarkMode() { if (!enabled) return; // Create style element if it doesn't exist var style = document.getElementById('universal-dark-mode-style'); if (!style) { style = document.createElement('style'); style.id = 'universal-dark-mode-style'; document.head.appendChild(style); } // Dark mode CSS - inverts colors but preserves images/video style.textContent = ' /* Invert everything except media */ html { filter: invert(1) hue-rotate(180deg) !important; background: #1a1a2e !important; } /* Restore images, videos, iframes, canvas */ img, video, iframe, canvas, svg, picture, [style*="background-image"] { filter: invert(1) hue-rotate(180deg) !important; } /* Preserve specific elements that should not be inverted */ .no-dark-mode, .no-dark-mode *, [data-theme="light"], [data-theme="light"], .ace_editor, .ace_editor *, .CodeMirror, .CodeMirror *, .monaco-editor, .monaco-editor *, .markdown-body pre, .markdown-body pre *, .highlight, .highlight *, pre code, pre code * { filter: none !important; } /* Fix common UI elements */ .modal, .popup, .dropdown-menu, .tooltip, .popover { filter: invert(1) hue-rotate(180deg) !important; background: #2d2d44 !important; border-color: #444 !important; } /* Scrollbars */ ::-webkit-scrollbar { background: #1a1a2e !important; } ::-webkit-scrollbar-thumb { background: #444 !important; } ::-webkit-scrollbar-thumb:hover { background: #555 !important; } /* Selection */ ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; } ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; } '; } function removeDarkMode() { var style = document.getElementById('universal-dark-mode-style'); if (style) style.remove(); } // Toggle with Alt+Shift+D document.addEventListener('keydown', function(e) { if (e.altKey && e.shiftKey && e.key === 'D') { e.preventDefault(); enabled = !enabled; if (enabled) { applyDarkMode(); console.log('[Universal Dark Mode] Enabled'); } else { removeDarkMode(); console.log('[Universal Dark Mode] Disabled'); } } }); // Apply on load applyDarkMode(); // Re-apply on dynamic content var observer = new MutationObserver(function(mutations) { if (enabled && !document.getElementById('universal-dark-mode-style')) { applyDarkMode(); } }); observer.observe(document.head, { childList: true }); console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle'); })(); } } catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); } })(); })();
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VCS Extension Specification

This document explains the VCS Extension to the SpatioTemporal Asset Catalog (STAC) specification.

It describes a version control system (VCS) reference, e.g. the Git repository, branch or commit that a catalog or an application originates from. It is typically used on a link with the vcs relation type (see the Application Extension).

Fields

The fields in the table below can be used in these parts of STAC documents:

  • Catalogs
  • Collections
  • Item Properties (incl. Summaries in Collections)
  • Assets (for both Collections and Items, incl. Item Asset Definitions in Collections and Asset Templates)
  • Links (incl. Link Templates)
  • Bands
Field NameTypeDescription
vcs:typestringThe type of version control system, e.g. git.
vcs:branchstringThe branch, e.g. main.
vcs:commitstringThe commit hash.
vcs:tagstringThe tag, e.g. v1.0.0.

At least one of the fields must be provided where the extension is used.

Contributing

All contributions are subject to the STAC Specification Code of Conduct. For contributions, please follow the STAC specification contributing guide Instructions for running tests are copied here for convenience.

Running tests

The same checks that run as checks on PRs are part of the repository and can be run locally to verify that changes are valid. To run tests locally, you'll need npm, which is a standard part of any node.js installation.

First you'll need to install everything with npm once. Just navigate to the root of this repository and on your command line run:

npm install

Then to check markdown formatting and test the examples against the JSON schema, you can run:

npm test

This will spit out the same texts that you see online, and you can then go and fix your markdown or examples.

If the tests reveal formatting problems with the examples, you can fix them with:

npm run format-examples

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