OpenCitations Index N-Triples dataset of all the citation data

This dataset contains all the citation data (in N-Triples format) included in the OpenCitations Index, released on July 10, 2025. In particular, any citation in the dataset, defined as an individual of the class <i>cito:Citation</i>, includes the following information:<b>[citation IRI]</b> the Open Citation Identifier (OCI) for the citation, defined in the final part of the URL identifying the citation (https://w3id.org/oc/index/ci/[OCI]);<b>[property "cito:hasCitingEntity"]</b> the citing entity identified by its OMID URL (https://https://opencitations.net/meta/[OMID]);<b>[property "cito:hasCitedEntity"]</b> the cited entity identified by its OMID URL (https://https://opencitations.net/meta/[OMID]);<b>[property "cito:hasCitationCreationDate"]</b> the creation date of the citation (i.e. the publication date of the citing entity);<b>[property "cito:hasCitationTimeSpan"]</b> the time span of the citation (i.e. the interval between the publication date of the cited entity and the publication date of the citing entity);<b>[type "cito:JournalSelfCitation"]</b> it records whether the citation is a journal self-citations (i.e. the citing and the cited entities are published in the same journal);<b>[type "cito:AuthorSelfCitation"]</b> it records whether the citation is an author self-citation (i.e. the citing and the cited entities have at least one author in common).<b>Note: </b>the information for each citation is sourced from OpenCitations Meta (https://opencitations.net/meta), a database that stores and delivers bibliographic metadata for all bibliographic resources included in the OpenCitations Indexes. The data provided in this dump is therefore based on the state of OpenCitations Meta at the time this collection was generated.This version of the dataset contains:2,216,426,689 citationsThe size of the zipped archive is 87.4 GB, while the size of the unzipped N-Triples files is 2.1 TB.

本数据集包含2025年7月10日发布的OpenCitations索引（OpenCitations Index）中收录的全部引用数据，格式为N-Triples。具体而言，本数据集中的每条引用均属于<cito:Citation>类别的个体，包含以下信息：
<b>[引用统一资源标识符（IRI）]</b>：该引用的开放引用标识符（Open Citation Identifier, OCI），其对应标识URL的末尾部分为`https://w3id.org/oc/index/ci/[OCI]`；
<b>[属性"cito:hasCitingEntity"]</b>：引用发起实体，通过其OMID URL（`https://opencitations.net/meta/[OMID]`）进行标识；
<b>[属性"cito:hasCitedEntity"]</b>：被引用实体，通过其OMID URL（`https://opencitations.net/meta/[OMID]`）进行标识；
<b>[属性"cito:hasCitationCreationDate"]</b>：引用创建日期，即引用发起实体的出版日期；
<b>[属性"cito:hasCitationTimeSpan"]</b>：引用时间跨度，即被引用实体的出版日期与引用发起实体的出版日期之间的时间间隔；
<b>[类型"cito:JournalSelfCitation"]</b>：该字段记录该引用是否为期刊自引用，即引用发起实体与被引用实体发表于同一期刊；
<b>[类型"cito:AuthorSelfCitation"]</b>：该字段记录该引用是否为作者自引用，即引用发起实体与被引用实体存在至少一位共同作者。

<b>注：</b>本数据集的每条引用信息均源自OpenCitations Meta（`https://opencitations.net/meta`），该数据库用于存储并分发OpenCitations索引中收录的所有文献资源的书目元数据。因此本数据转储文件提供的数据基于本数据集生成时OpenCitations Meta的当前状态。

本数据集版本共包含2,216,426,689条引用数据；压缩归档的大小为87.4 GB，解压后的N-Triples文件总大小为2.1 TB。