Add relations between Event and collocated event, Event and Event Ser…

…ies, and Event and Contribution to Event in the md file (#26)

README.md

@@ -31,10 +31,11 @@ Projects typically make use of [Infrastructure](./entities/Infrastructure.md).
 Agents can make [Contributions to Infrastructure](./entities/Contribution_to_Infrastructure.md).
 
 Scientific and other [Events](./entities/Event.md) support communication, including scholarly communication. 
-Agents can make different [Contributions to Events](./entities/Contribution_to_Event.md).
+Agents can make different [Contributions to Events](./entities/Contribution_to_Event.md). Events can be organized within [Event Series](./entities/Event_Series.md)
 
 Information and knowledge are typically stored in [Documents](./entities/Document.md), for instance [Textual Documents](./entities/Textual_Document.md).
 Agents can make different [Contributions to Documents](./entities/Contribution_to_Document.md), most notably that of [Authorship](./entities/Authorship.md).
+Documents can be published in numerous [Publication Channels](./entities/Publication_Channel.md)
 Accessibility of Documents is a pressing issue, so it can be expressed in [Textual Document Accessibility Specifications](./entities/Textual_Document_Accessibility_Specification.md).
 
 Agents prepare and submit [Applications](./entities/Application.md), for instance [Funding Applications](./entities/Funding_Application.md).
@@ -87,6 +88,7 @@ for instance the [DOI Identifier](./entities/DOI_Identifier.md), [Wikidata Resou
 * [Textual Document Accessibility Specification](./entities/Textual_Document_Accessibility_Specification.md)
 * [Project](./entities/Project.md)
 * [Event](./entities/Event.md)
+* [Event Series](./entities/Event_Series.md)
 * [Publication Channel](./entities/Publication_Channel.md)
 * [Resource](./entities/Resource.md)
   * [Funding](./entities/Funding.md)

entities/Event.md

@@ -7,8 +7,7 @@ A thing that happens, especially something important.<sup>[1](#fn1)</sup>
 ## Usage notes
 
 Events include scientific and other conferences, workshops, seminars or any other type of meeting. 
-It can be one particular event (for instance the [CRIS 2024](https://cris2024.eurocris.org/) conference), 
-or a series of events (for instance the [euroCRIS Webinar series](https://eurocris.org/eurocris-events)).
+It can be one particular event, for instance the [CRIS 2024](https://www.confident-conference.org/index.php/Event:1e5e84d7-e5d3-4b77-a1c2-852a1dbb446f) conference.
 
 ## Attributes
 
@@ -20,12 +19,18 @@ description : [Multilingual String](../datatypes/Multilingual_String.md)
 
 dateRange : [Date Range](../datatypes/Date_Range.md)
 
+ordinal number: [Decimal](../datatypes/Decimal.md)
+
 contacts : List<[Contact_Information](../datatypes/Contact_Information.md)>
 
 ## Relationships
 
 <a name="rel__has-contribution">has-contribution</a> / [has-target](../entities/Contribution_to_Event.md#user-content-rel__has-target) : An Event can have any number of [contributions](../entities/Contribution_to_Event.md) that helped it take place or arise.
 
+<a name="rel__collocated-with">collocated-with</a> : An Event can be collocated with the another [Events](../entities/Event.md).
+
+<a name="rel__belongs-to-series">belongs-to-series</a> / [has-instances](../entities/Event_Series.md#user-content-rel__has-instances) : An Event can be an instance of [Event Series](../entities/Event_Series.md).
+
 ---
 ## Matches
 Narrow match of Schema.org [Event](https://schema.org/Event).

entities/Event_Series.md

@@ -0,0 +1,35 @@
+# Event_Series
+
+## Definition
+
+A thing that happens regularly (annually, bi-annually, etc.) about a particular subject.
+
+## Usage notes
+
+Event series include scientific and other conferences, workshops, seminars or any other type of meeting. 
+One example is the [CRIS - International Conference on Current Research Information Systems](https://www.confident-conference.org/index.php/Event_Series:10ba49ac-d068-47b4-a82c-02c18cc1a200).
+
+## Attributes
+
+title : [Multilingual String](../datatypes/Multilingual_String.md)
+
+acronym : [Multilingual String](../datatypes/Multilingual_String.md)
+
+description : [Multilingual String](../datatypes/Multilingual_String.md)
+
+recurrence period : [Decimal](../datatypes/Decimal.md)
+
+recurrence unit : [Multilingual String](../datatypes/Multilingual_String.md)
+
+contacts : List<[Contact_Information](../datatypes/Contact_Information.md)>
+
+## Relationships
+
+<a name="rel__has-instances">has-instances</a> / [belongs-to-series](../entities/Event.md#user-content-rel__belongs-to-series) : An Event Series has list of [Event](../entities/Event.md) instances which have been organized.
+
+---
+## Matches
+Narrow match of Schema.org [Event](https://schema.org/Event).
+
+## References
+<a name="fn1">\[1\]</a> Source: The Cambridge Dictionary of English. https://www.oxfordlearnersdictionaries.com/definition/english/event