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1876 lines (1708 loc) · 68.2 KB
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<!DOCTYPE html>
<html lang="en" style="visibility: hidden; background-color: #000;">
<!-- © OpenUniverse Web Design 2025 -->
<!-- 𝗢𝗽𝗲𝗻𝗨𝗻𝗶𝘃𝗲𝗿𝘀𝗲 -->
<!--
https://www.pexels.com/video/officers-investigating-7253660/
-->
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<meta name="theme-color" content="#000">
<title>OpenUniverse</title>
<!--<a href="https://www.freepik.com/icon/mars_11829841#fromView=family&page=1&position=7&uuid=323f4209-ab6b-4dec-a6be-c691a9b26257">Mars Icon by Mayor Icons</a>. <a href="https://www.freepik.com/author/mayoricons">Icon by Mayor Icons</a>.-->
<!--
<link rel="icon" type="image/png" href="img/icons/mars_11829841.png">
-->
<link rel="icon" type="image/png" href="img/icons/glucose_8205747.svg">
<link rel="manifest" href="manifest.json">
<link rel="preload" href="/fonts/TiltWarp-Regular-VariableFont_XROT,YROT.woff2" as="font" type="font/woff2" crossorigin="anonymous">
<link rel="preload" href="/fonts/Roboto-Thin.woff2" as="font" type="font/woff2" crossorigin="anonymous">
<link rel="preload" href="/fonts/Roboto-Regular.woff2" as="font" type="font/woff2" crossorigin="anonymous">
<link rel="preload" href="/fonts/RobotoCondensed-VariableFont_wght.woff2" as="font" type="font/woff2" crossorigin="anonymous">
<script type="text/javascript" src="js/TagCloud.min.js"></script>
<script>
if ('serviceWorker' in navigator) {
navigator.serviceWorker.register('service-worker.js');
}
</script>
<script src="js/cdnjs.cloudflare.com/ajax/libs/three.js/r121/three.min.js"></script>
<script src="js/cdn.jsdelivr.net/npm/vanta@latest/dist/vanta.net.min.js"></script>
<script src="js/cdn.jsdelivr.net/npm/vanta@latest/dist/vanta.fog.min.js"></script>
<style>
:root {
color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
html {
background: #000;
}
}
html {
visibility: hidden;
background-color: #000;
margin: 0;
padding: 0;
overflow-x: hidden;
}
@font-face {
font-family: 'TiltWarp-Regular';
src: url("fonts/TiltWarp-Regular-VariableFont_XROT,YROT.woff2") format("woff2");
}
@font-face {
font-family: RobotoRegular;
src: url("fonts/Roboto-Regular.woff2") format("woff2");
}
@font-face {
font-family: RobotoThin;
src: url("fonts/Roboto-Thin.woff2") format("woff2");
}
@font-face {
font-family: RobotoCondensed;
src: url("fonts/RobotoCondensed-VariableFont_wght.woff2") format("woff2");
}
html {
scrollbar-width: thin;
scrollbar-color: #FD3F84 #555;
}
body {
margin: 0;
padding: 0;
font-family: RobotoRegular;
font-size: 1rem;
overflow-y: hidden;
}
h1,
h2,
h3,
h4,
h5,
h6 {
text-wrap-style: balance;
}
p {
hyphens: auto;
text-wrap-style: pretty;
}
h2 {
font-family: RobotoThin;
font-size: 2.5rem;
margin: 0;
margin-bottom: 0;
}
h3 {
font-family: RobotoThin;
font-size: 2rem;
font-weight: bold;
margin: 0;
margin-bottom: 0;
}
i {
font-family: Georgia, 'Times New Roman', Times, serif;
font-style: italic;
font-size: 1.6rem;
}
a {
color: inherit;
text-decoration: none;
}
a:hover {
text-decoration: underline;
}
abbr:hover {
cursor: help;
}
section:last-of-type {
background-color: #111;
}
.flowchart {
display: flex;
flex-wrap: wrap;
gap: 2rem;
}
.boxed {
height: 19rem;
width: 19rem;
font-family: RobotoCondensed, monospace !important;
line-height: 1.2rem;
font-size: 1rem;
border: 1px dotted;
padding: 1rem;
transition: border 0.3s;
}
.boxed:hover {
border: 1px solid;
}
.section-wrapper {
max-width: 1280px;
margin: auto;
margin-bottom: -1px;
/* Need for brands section */
display: flex;
flex-direction: row;
padding: 0;
}
.adv-section .section-wrapper {
background-color: rgba(0, 0, 0, 0.2);
}
.page {
min-height: 100vh;
max-height: 100vh;
display: flex;
width: 100%;
height: 100%;
flex-direction: column;
margin: 0;
padding: 0;
background-color: #000;
background-size: cover;
background-position: center;
background-repeat: no-repeat;
}
.bg-img {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
width: 100%;
height: auto;
max-height: 100%;
object-fit: cover;
opacity: 0.5;
z-index: 1;
margin: auto;
opacity: .05;
}
.section-wrapper.reverse {
flex-direction: row-reverse;
}
.adv-section.color-red {
background-color: #FD3F84;
color: #fff;
}
.adv-section.color-red-super {
background-color: #CA326A;
color: #fff;
}
.adv-section.color-black {
background-color: #666;
color: #fff;
}
.adv-section.color-black-super {
background-color: #444;
color: #fff;
}
.adv-section.color-turquoise {
background-color: #6A435B;
color: #fff;
}
.adv-section.color-turquoise-super {
background-color: #008486;
color: #fff !important;
border-color: #fff !important;
}
.section-text {
flex: 1;
display: flex;
flex-direction: column;
justify-content: center;
padding-left: 2.5rem;
padding-right: 2.5rem;
min-height: 470px;
font-size: 1.5rem !important;
z-index: 1;
}
.product-header {
display: flex;
flex-direction: column;
user-select: none;
margin: auto;
z-index: 1000;
}
@keyframes fadeIn {
to {
color: white;
border-color: white;
opacity: 1;
}
}
.product-name {
font-family: 'TiltWarp-Regular';
font-weight: bold;
user-select: none;
}
.product-name-0 {
text-rendering: optimizeLegibility;
font-size: 9cqw;
line-height: 9cqw;
letter-spacing: .03em;
color: transparent;
text-shadow: unset;
animation-name: fadeIn;
animation-duration: 4s;
animation-timing-function: ease-in;
animation-fill-mode: forwards;
animation-delay: 1.5s;
}
.slogan {
color: transparent;
text-shadow: unset;
animation-name: fadeIn;
animation-duration: 4s;
animation-timing-function: ease-in;
animation-fill-mode: forwards;
animation-delay: 3.5s;
}
.slogan-0 {
text-transform: uppercase;
text-rendering: optimizeLegibility;
letter-spacing: .0265em !important;
font-family: RobotoThin;
font-weight: bold;
font-size: 4.6cqw;
line-height: 6cqw;
}
.slogan-1 {
padding-top: 3cqw;
text-rendering: optimizeLegibility;
letter-spacing: .024cqw !important;
font-size: 6.327cqw;
font-family: RobotoThin;
align-self: center;
}
.bottom-content {
padding-left: 2rem;
padding-right: 2rem;
}
.section-wrapper-bottom {
position: relative;
flex-direction: column;
background: #000;
}
.footer-buttons {
padding-top: 1rem;
display: flex;
gap: 1.5rem;
justify-content: end;
}
.acknowledgments {
padding-top: 2rem;
padding-bottom: 3rem;
font-size: .8rem !important;
color: #ccc;
text-align: justify;
hyphens: auto;
text-wrap: wrap;
overflow-wrap: break-word;
word-break: break-all;
}
.footer-row-1 {
display: flex;
flex-direction: row;
width: 100%;
}
.footer {
width: 100%;
display: flex;
flex-wrap: wrap;
font-size: .8rem;
padding-top: 3rem;
margin-bottom: 1rem;
justify-content: space-between;
gap: 1.2rem;
}
.ou-row-top {
font-size: 1.9rem;
line-height: 1.7rem;
}
.ou-row-bottom {
font-weight: bold;
font-family: RobotoThin;
font-size: 1.20rem;
line-height: 1rem;
}
.footer-column-logo {
display: flex;
flex-direction: column;
text-wrap: nowrap;
color: #fff;
gap: .3rem;
height: fit-content;
margin-top: -.38rem;
}
.footer-column-header {
color: #fff;
font-weight: bold;
font-size: 16px;
line-height: 16px;
margin-bottom: 12px;
}
.footer-column ul {
list-style: none;
padding: 0;
margin: 0;
}
.footer-column li {
margin-bottom: 8px;
text-wrap: nowrap;
}
.footer-column a {
color: #ccc;
}
.footer-column a:hover {
text-decoration: underline;
}
.side-img {
height: auto;
max-width: 35%;
min-height: max-content;
object-fit: cover;
flex-shrink: 0;
}
.mars {
margin-right: 2rem;
padding-top: 2rem;
max-width: 10rem;
max-height: 10rem;
}
.page-buttons {
display: flex;
width: fit-content;
align-self: end;
gap: 2cqw;
padding-right: 2cqw;
padding-bottom: 2cqw;
}
.button {
display: flex;
justify-content: center;
width: fit-content;
height: 3rem;
padding-left: 1.2rem;
padding-right: 1.2rem;
font-family: RobotoThin;
font-weight: bold;
font-size: 1.5rem;
line-height: calc(3rem - 2px);
border: 1px solid;
text-decoration: none !important;
user-select: none;
transition: color 0.3s, border-color 0.3s, text-shadow 0.3s, box-shadow 0.3s;
cursor: pointer;
z-index: 1000;
}
.button-learn {
min-width: 10rem;
color: transparent;
border-color: transparent;
animation-name: fadeIn;
animation-duration: 1s;
animation-timing-function: ease-in;
animation-fill-mode: forwards;
animation-delay: 4s;
}
.button-learn:hover {
color: #fff;
border-color: #fff;
text-shadow: 0 0 6px #fff;
box-shadow: 0 0 6px #fff;
}
.github-icon {
width: 1.8rem;
filter: invert(1);
padding-right: .8rem;
opacity: 0;
animation-name: fadeIn;
animation-duration: 1s;
animation-timing-function: ease-in;
animation-fill-mode: forwards;
animation-delay: 4s;
}
.videoWrapper {
position: relative;
width: 65%;
}
.videoWrapper iframe {
position: absolute;
width: 100%;
height: 100%;
}
.button-touch,
.button-up {
justify-self: flex-end;
margin-bottom: 1rem;
color: #ccc;
}
.button-touch:hover,
.button-up:hover {
color: #fff;
border-color: #fff;
text-shadow: 0 0 6px #fff;
box-shadow: 0 0 6px #fff;
}
/* BRANDS */
.brands-grid {
display: flex;
flex-wrap: wrap;
}
.brand {
padding-right: 40px;
padding-bottom: 50px;
filter: brightness(0) invert(1);
}
.fade-image {
width: 100% !important;
height: 598px !important;
background-image:
linear-gradient(to bottom, transparent 90%, black 100%),
url("img/donald-giannatti-Wj1D-qiOseE-unsplash.jpg");
background-position: center;
background-size: cover;
background-repeat: no-repeat;
}
/* MEDIA */
@media print {
.button {
display: none !important;
}
}
@media (max-width: 1080px) {
.page {
min-height: 100vh;
}
.adv-section .section-wrapper {
background-color: unset;
}
}
@media (max-width: 768px) {
.header-icon-mars {
display: none;
}
.footer {
flex-wrap: wrap;
}
.footer-column-logo {
width: 100%;
padding-bottom: 1.5rem;
}
.section-wrapper,
.section-wrapper.reverse {
flex-direction: column !important;
}
.section-wrapper p,
.section-wrapper.reverse p {}
.section-text {
padding-top: 2rem;
padding-left: 1rem;
padding-right: 1rem;
}
.section-text p {
text-justify: distribute;
hyphens: auto;
padding-bottom: 2.5rem;
text-wrap: wrap;
overflow-wrap: break-word;
}
.videoWrapper {
width: 100% !important;
padding-bottom: 56.25%;
/* 16:9 aspect ratio (9/16 = 0.5625) */
height: 0;
/* important! */
overflow: hidden;
}
.side-img {
max-width: 100% !important;
width: 100% !important;
}
.mars {
display: none;
}
.fade-image {
max-height: 200px !important;
}
.boxed {
width: 100%;
}
.page-buttons {
align-self: center;
padding-right: 0;
flex-direction: column;
gap: 2rem;
padding-bottom: 24rem;
}
.button-learn {
min-width: 59.2cqw;
padding-left: 0;
padding-right: 0;
}
}
.tag-cloud-keywords {
font-family: RobotoRegular;
font-weight: bold;
text-wrap-mode: nowrap;
width: 100%;
min-height: 400px;
}
.tag-cloud-langs {
font-family: RobotoThin;
font-weight: bold;
width: 100%;
min-height: 400px;
}
</style>
</head>
<body>
<div class="page">
<img class="bg-img" src="img/icons/glucose_8205747.svg" />
<!--
<img src="img/icons/glucose_8205747.svg">
<img src="img/icons/mars_11829841.png">
-->
<div class="product-header">
<div class="product-name product-name-0">Open<wbr>Universe</div>
<div class="slogan slogan-0">There are no boundaries</div>
<div class="slogan slogan-1">
Let's Create
</div>
</div>
<div class="page-buttons">
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<p>
<h2>What is <span class="product-name">Universe</span>?</h2>
<p>
A <b>Universe</b> is a complete digital environment that connects data, information, and knowledge across
diverse domains. It extends beyond IT infrastructure to include <b>ALL</b> data sources like physical assets,
business processes, regulatory constraints, data lifecycles, and knowledge flows. A Universe can be
understood
through different perspectives:
</p>
<ul>
<li>Structural (composition, ownership, hierarchy).</li>
<li>Functional (usage, control, data flow).</li>
<li>Historical (lineage, evolution, journals and immutable traces of changes).</li>
<li>Regulatory (compliance obligations, contractual bindings, access constraints).</li>
<li>Protocols (standards, interoperability, communication rules).</li>
</ul>
<p>
It also encompasses events, transactions, state changes, and lifecycle transitions, thereby enabling reasoning
about system evolution. In this sense, a Universe is a living ecosystem where raw data flows into information,
and information evolves into knowledge, shaping how people, machines, and structures interact securely and
intelligently.
<br><br>
</p>
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<h2>Universe as Code</h2>
<p>
<b>UaC (Universe as Code)</b> is the forward-thinking extension of the well-known IaC (Infrastructure as
Code)
paradigm. While IaC focuses on describing and automating IT infrastructure such as servers, networks, and
software stacks, UaC embraces a much broader and more complex scope.
In UaC, the principle of declarative,
code-driven definition extends not only to infrastructure but also to physical assets, business processes,
regulatory constraints, data lifecycles, and knowledge flows.<br><br>
Just as IaC transformed system
administration into programmable workflows, UaC envisions an environment where entire digital-physical
ecosystems can be described, evolved, and reasoned about through code. This approach anticipates future
needs
where interoperability, compliance, intelligence, and evolution of systems are orchestrated holistically,
making UaC a natural evolution beyond IaC.
</p>
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<br>
<h2>Why <span class="product-name">Open<wbr>Universe</span>?</h2>
<p>
<span class="product-name">Open<wbr>Universe</span> is an ultralight, security-first open source UaC (Universe as Code) platform that unifies your environment.
</p>
<p>
Traditional Infrastructure as Code tools such as Terraform are effective for provisioning and
configuration but are not designed for real-time, event-driven orchestration across diverse systems.
OpenUniverse fills this gap by enabling triggers, workflows, and responses to be
defined as code and executed dynamically across cloud services, on-premise systems, IoT devices, and legacy applications.
</p>
<p>
The platform ensures that orchestration logic is versioned, signed, and timestamped for compliance and traceability,
while maintaining security through cryptographic chaining of records. Because it is system-neutral, it integrates
across heterogeneous technologies without vendor lock-in.
</p>
<p>
By combining real-time coordination with auditability and long-term verifiability,
OpenUniverse extends the benefits of IaC into the operational domain,
offering a structured and predictable approach to automation that aligns with regulatory and governance needs.
</p> <br>
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<br>
<h2>Decentralized Orchestration</h2>
<p>OpenUniverse operates in a world without a single point of control. Unlike traditional systems that rely on centralized servers or orchestration engines, OpenUniverse treats every component — events, jobs, triggers, processors, and systems — as part of a decentralized, self-organizing network.</p>
<p>In OpenUniverse, workflows are not dictated by a central engine. Instead, each component communicates through cross-referenced event streams, allowing jobs and triggers to react dynamically to changes anywhere in the system. This model ensures:</p>
<ul>
<li><strong>Resilience:</strong> There is no single point of failure. Nodes can join or leave the system without disrupting processing.</li>
<li><strong>Scalability:</strong> Workloads distribute naturally across available resources, allowing the system to expand organically.</li>
<li><strong>Autonomy:</strong> Each component decides its actions based on local state and incoming events, while still contributing to global orchestration.</li>
</ul>
<h2 style="text-align: end;">...There Is No Center</h2>
<br><br>
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<br>
</p>
<h2>How it works</h2>
<p>
OpenUniverse operates in several stages to transform static document definitions into a dynamic,
event-driven infrastructure.
<br><br>
Before any processing begins, OpenUniverse optionally performs a self-check to verify its own integrity:
<ul>
<li>The distribution JAR is validated against its expected SHA-256 checksum.</li>
<li>The JAR’s digital signature is verified to ensure it originates from a trusted source and has not been tampered with.</li>
<li>A detailed self-check report is generated and stored in the repository, providing a permanent audit trail of verification results.</li>
</ul>
<br>
Next, the repository working directory is scanned for documents. Each document is represented as a JSON
object. A single JSON file may contain a single document or an array of documents. During this scan,
OpenUniverse automatically skips any documents with unsupported specification versions or those explicitly
marked as disabled.
<br><br>
In addition to JSON, documents and plugins may also be authored directly in Markdown files.
This allows developers to provide human-readable documentation alongside executable definitions, blending
source, commentary, and infrastructure logic in a single artifact.
<br><br>
If the repository is marked to enforce signed commits (via repository configuration), OpenUniverse performs
commit signature verification before any constraint checks:
<ul>
<li>The system extracts the HEAD commit signature and verifies its cryptographic validity.</li>
<li>It evaluates the signing key:
<ul>
<li>Only keys marked as ultimately trusted (u) or fully trusted (f) in the GnuPG keyring are accepted.</li>
<li>Keys that are revoked, expired, disabled, marginal, or unknown are rejected.</li>
</ul>
</li>
<li>If the signature verification fails or the key does not meet the strict trust criteria, processing halts to prevent execution of untrusted or tampered documents.</li>
</ul>
If the repository is not marked for signed commits, this step is skipped and documents are processed normally.
<br><br>
Next, each discovered document is passed through an optional chain of pre-run constraints, if declared.
Constraints ensure that documents meet structural, logical, and environmental requirements before execution.
Processing does not start if any constraint reports invalid requirements.
<br><br>
Once validation is complete, OpenUniverse enters the discovery phase. Here, the system analyzes declared
search queries, resolves cross-references between documents, and maps their relationships.
<br><br>
After discovery, OpenUniverse loads the resolved document instances and begins execution. At this point, the
runtime becomes active:
<ul>
<li><b>Triggers</b> fire events based on conditions, calendars, or schedules</li>
<li><b>Processors</b> consume event messages and execute the appropriate activities across <b>systems</b> defined
in <b>jobs</b></li>
<li><b>Export targets</b> deliver data to external backends for storage or further processing</li>
<li><b>DMQ</b> intercepts undeliverable or failed messages, routing them into a dedicated dead-message queue
for later inspection, retries, or manual handling</li>
</ul>
<br>
<p>Every record produced by OpenUniverse is secured and traceable through multiple layers of protection:</p>
<ul>
<li><b>Identity & Ordering</b> – each record carries a globally unique identifier (GUID) and a serial number within its node’s stream, ensuring uniqueness and ordered traceability.</li>
<li><b>Integrity & Authenticity</b> – contents are hashed with SHA-256 and digitally signed to prevent tampering and prove origin.</li>
<li><b>Time Assurance</b> – records receive real-time NTP timestamps, are additionally sealed by a trusted Certificate Authority (CA) for long-term non-repudiation, and timestamped by a Time Stamping Authority (TSA, RFC 3161) for independent verification.</li>
<li><b>Immutability</b> – every record references the hash of its predecessor, forming a blockchain-style ledger that makes alterations immediately evident.</li>
</ul>
</p>
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<br>
</p>
<h2>Core components</h2>
<p>
The architecture is based on documents as the primary abstraction. Each component—events, jobs, triggers,
systems, and processors—is described as a structured document, with the RootDocument serving as the central
blueprint. This model makes the environment self-describing, auditable, and easy to evolve.
Execution is fully event-driven. Events from calendars, schedulers, or publishers activate jobs, which
process
them through defined processors and then act on target systems. Instead of static configuration,
relationships
between jobs, events, and systems are discovered dynamically at runtime, creating adaptive orchestration
flows.
<br><br>
<h3 style="">Documents:</h3><br>
<div class="flowchart">
<div class="boxed">
<b>AbstractDocument</b> (Abstract)
<br><br>
┌ <b>Header (HeaderObject)</b><br>
└ <b>Properties (Map)</b>
</div>
<div class="boxed">
<b>RootDocument</b><br>
extends <b>AbstractDocument</b>
<br><br>
┌ <b>Header (HeaderObject)</b><br>
├ <b>Properties (Map)</b><br>
├ Triggers (List<TriggerDocument>)<br>
├ Jobs (List<JobDocument>)<br>
├ SignSettings (SignSettingsObject)<br>
├ HashAlgorithm (String)<br>
├ UnprotectPlugin (PluginObject)<br>
├ ExportTargets (List<ExportTargetObject>)<br>
└ <abbr title="Dead Message Queue">DMQ</abbr>Plugin (PluginObject)
</div>
<div class="boxed">
<b>EventDocument</b><br>
extends <b>AbstractDocument</b>
<br><br>
┌ <b>Header (HeaderObject)</b><br>
├ <b>Properties (Map)</b><br>
└ Processable (Boolean)
</div>
<div class="boxed">
<b>Triggers/CalendarDocument</b><br>
extends <b>AbstractDocument</b>
<br><br>
┌ <b>Header (HeaderObject)</b><br>
├ <b>Properties (Map)</b><br>
└ Calendars (List<CalendarObject>)
</div>
<div class="boxed">
<b>Triggers/SchedulerDocument</b><br>
extends <b>AbstractDocument</b>
<br><br>
┌ <b>Header (HeaderObject)</b><br>
├ <b>Properties (Map)</b><br>
└ Schedulers (List<SchedulerObject>)
</div>
<div class="boxed">
<b>Triggers/EventPublisherDocument</b><br>
extends <b>AbstractDocument</b>
<br><br>
┌ <b>Header (HeaderObject)</b><br>
├ <b>Properties (Map)</b><br>
└ EventPublisherPlugin (PluginObject)
</div>
<div class="boxed">
<b>JobDocument</b><br>
extends <b>AbstractDocument</b>
<br><br>
┌ <b>Header (HeaderObject)</b><br>
├ <b>Properties (Map)</b><br>
├ Systems (List<SystemDocument>)<br>
└ EventProcessors (List<ProcessorDocument>)
</div>
<div class="boxed">
<b>SystemDocument</b><br>
extends <b>AbstractDocument</b>
<br><br>
┌ <b>Header (HeaderObject)</b><br>
├ <b>Properties (Map)</b><br>
└ AbstractSystemDefinition (Object)
</div>
<div class="boxed">
<b>EventProcessorDocument</b><br>
extends <b>AbstractDocument</b>
<br><br>
┌ <b>Header (HeaderObject)</b><br>
├ <b>Properties (Map)</b><br>
└ EventProcessorPlugin (PluginObject)
</div>
</div>
<br><br>
<h3>Objects:</h3><br>
<div class="flowchart">
<div class="boxed">
<b>HeaderObject</b>
<br><br>
┌ SpecVer (String)<br>
├ Type (String)<br>
├ Name (String)<br>
├ Description (String)<br>
├ Disabled (Boolean)<br>
├ Tags (List)<br>
├ Attributes (Map)<br>
└ PreRunConstraints (List<PluginObject>)
</div>
<div class="boxed">
<b>PluginObject</b>
<br><br>
┌ Command (String)<br>
├ Arguments (List)<br>
├ EnvironmentVariables (Map)<br>
├ WorkingDirectory (String)<br>
├ ErrorLogFile (String)<br>
└ InstancesCount (Integer)
</div>
<div class="boxed">
<b>CalendarObject</b>
<br><br>
┌ EventType (String)<br>
├ ScheduledFor (Time)<br>
└ user-defined fields...
</div>
<div class="boxed">
<b>SchedulerObject</b>
<br><br>
┌ EventType (String)<br>
├ CronExpression (String)<br>