10084: added cursor pagination. & date range in yyyy format #81
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@ -36,7 +36,7 @@ The following query parameters are available for research products:
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| **Parameter** | **Description** |
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|-------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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|-------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| **search** | Search in the content of the research product. |
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| **mainTitle** | Search in the research product's main title. |
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| **description** | Search in the research product's description. |
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@ -44,18 +44,18 @@ The following query parameters are available for research products:
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| **pid** | The persistent identifier of the research product. |
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| **originalId** | The identifier of the record at the original sources. |
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| **type** | The type of the research product. One of `publication`, `dataset`, `software`, or `other` |
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| **fromPublicationDate** | Gets the research products whose publication date is greater than or equal to the given date. A date formatted as `YYYY-MM-DD` |
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| **toPublicationDate** | Gets the research products whose publication date is less than or equal to the given date. A date formatted as `YYYY-MM-DD` |
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| **fromPublicationDate** | Gets the research products whose publication date is greater than or equal to the given date. A date formatted as `ΥΥΥΥ` or `YYYY-MM-DD` |
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| **toPublicationDate** | Gets the research products whose publication date is less than or equal to the given date. A date formatted as `YYYY` or `YYYY-MM-DD` |
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| **subjects** | List of subjects associated to the research product. |
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| **countryCode** | The country code for the country associated with the research product. |
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| **authorFullName** | The full name of the authors involved in producing this research product. |
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| **authorOrcid** | The ORCiD of the authors involved in producing this research product. |
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| **publisher** | The name of the entity that holds, archives, publishes prints, distributes, releases, issues, or produces the resource.
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| **publisher** | The name of the entity that holds, archives, publishes prints, distributes, releases, issues, or produces the resource. |
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| **bestOpenAccessRightLabel** | The best open access rights among the research product's instances. One of `OPEN SOURCE`, `OPEN`, `EMBARGO`, `RESTRICTED`, `CLOSED`, `UNKNOWN` |
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| **influenceClass** | Citation-based indicator that reflects the overall impact of a research product. Please, choose a class among `C1`, `C2`, `C3`, `C4`, or `C5` for top 0.01%, top 0.1%, top 1%, top 10%, and average in terms of influence respectively. |
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| **impulseClass** | Citation-based indicator that reflects the initial momentum of a research product directly after its publication. Please, choose a class among `C1`, `C2`, `C3`, `C4`, or `C5` for top 0.01%, top 0.1%, top 1%, top 10%, and average in terms of impulse respectively
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| **popularityClass** | Citation-based indicator that reflects current impact or attention of a research product. Please, choose a class among `C1`, `C2`, `C3`, `C4`, or `C5` for top 0.01%, top 0.1%, top 1%, top 10%, and average in terms of popularity respectively.
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| **citationCountClass** | Citation-based indicator that reflects the overall impact of a research product by summing all its citations. Please, choose a class among `C1`, `C2`, `C3`, `C4`, or `C5` for top 0.01%, top 0.1%, top 1%, top 10%, and average in terms of citation count respectively.
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| **impulseClass** | Citation-based indicator that reflects the initial momentum of a research product directly after its publication. Please, choose a class among `C1`, `C2`, `C3`, `C4`, or `C5` for top 0.01%, top 0.1%, top 1%, top 10%, and average in terms of impulse respectively |
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| **popularityClass** | Citation-based indicator that reflects current impact or attention of a research product. Please, choose a class among `C1`, `C2`, `C3`, `C4`, or `C5` for top 0.01%, top 0.1%, top 1%, top 10%, and average in terms of popularity respectively. |
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| **citationCountClass** | Citation-based indicator that reflects the overall impact of a research product by summing all its citations. Please, choose a class among `C1`, `C2`, `C3`, `C4`, or `C5` for top 0.01%, top 0.1%, top 1%, top 10%, and average in terms of citation count respectively. |
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| **instanceType** `[Only for publications]` | Retrieve publications of the given instance type. Check [here](http://api.openaire.eu/vocabularies/dnet:publication_resource) for all possible instance type values. |
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| **sdg** `[Only for publications]` | Retrieves publications classified with the respective Sustainable Development Goal number. Integer in the range [1, 17] |
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| **fos** `[Only for publications]` | Retrieves publications classified with a given Field of Science (FOS). A FOS classification identifier (see [here](https://explore.openaire.eu/assets/common-assets/vocabulary/fos.json) for details). |
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@ -76,6 +76,7 @@ The following query parameters are available for research products:
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| **debugQuery** | Retrieve debug information for the search query. (Boolean) |
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| **page** | Page number of the results. (Integer) |
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| **pageSize** | Number of results per page. Integer in the range [1, 100] |
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| **cursor** | Cursor-based pagination. Initial value: `cursor=*` |
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| **sortBy** | The field to set the sorting order of the results. Should be provided in the format `fieldname sortDirection`, where the `sortDirection` can be either `ASC` for ascending order or `DESC` for descending order and `fielaname` is one of `relevance`, `publicationDate`, `dateOfCollection`, `influence`, `popularity`, `citationCount`, `impulse`. Multiple sorting parameters should be comma-separated. |
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@ -84,7 +85,7 @@ The following query parameters are available for research products:
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The following query parameters are available for organizations:
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| **Parameter** | **Description** |
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|----------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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|----------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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|**search** | Search in the content of the organization. |
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|**legalName** | The legal name of the organization. |
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|**legalShortName** | The legal name of the organization in short form. |
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@ -96,6 +97,7 @@ The following query parameters are available for organizations:
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|**debugQuery** | Retrieve debug information for the search query. |
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|**page** | Page number of the results. |
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|**pageSize** | Number of results per page. |
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| **cursor** | Cursor-based pagination. Initial value: `cursor=*` |
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|**sortBy** | The field to set the sorting order of the results. Should be provided in the format `fieldname sortDirection`, where the `sortDirection` can be either `ASC` for ascending order or `DESC` for descending order - organizations can only be sorted by `relevance`. |
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@ -120,6 +122,7 @@ The following query parameters are available for data sources:
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|**debugQuery** |Retrieve debug information for the search query. |
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|**page** |Page number of the results. |
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|**pageSize** |Number of results per page. |
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| **cursor** | Cursor-based pagination. Initial value: `cursor=*` |
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|**sortBy** |The field to set the sorting order of the results. Should be provided in the format `fieldname sortDirection`, where the `sortDirection` can be either `ASC` for ascending order or `DESC` for descending order - data sources can only be sorted by `relevance`.|
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@ -128,7 +131,7 @@ The following query parameters are available for data sources:
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The following query parameters are available for projects:
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| **Parameter** | **Description** |
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|----------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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|----------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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|**search** | Search in the content of the projects. |
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|**title** | Search in the project's title. |
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|**keywords** | The project's keywords. |
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@ -138,10 +141,10 @@ The following query parameters are available for projects:
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|**callIdentifier** | The identifier of the research call. |
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|**fundingShortName** | The short name of the funder. |
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|**fundingStreamId** | The identifier of the funding stream. |
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|**fromStartDate** |Gets the projects with start date greater than or equal to the given date. Please provide a date formatted as `YYYY-MM-DD`. |
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|**toStartDate** |Gets the projects with start date less than or equal to the given date. Please provide a date formatted as `YYYY-MM-DD`. |
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|**fromEndDate** |Gets the projects with end date greater than or equal to the given date. Please provide a date formatted as `YYYY-MM-DD`. |
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|**toEndDate** |Gets the projects with end date less than or equal to the given date. Please provide a date formatted as `YYYY-MM-DD`. |
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|**fromStartDate** | Gets the projects with start date greater than or equal to the given date. Please provide a date formatted as `YYYY` or `YYYY-MM-DD`. |
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|**toStartDate** | Gets the projects with start date less than or equal to the given date. Please provide a date formatted as `YYYY` or `YYYY-MM-DD`. |
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|**fromEndDate** | Gets the projects with end date greater than or equal to the given date. Please provide a date formatted as `YYYY` or `YYYY-MM-DD`. |
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|**toEndDate** | Gets the projects with end date less than or equal to the given date. Please provide a date formatted as `YYYY` or `YYYY-MM-DD`. |
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|**relOrganizationName** | The name or short name of the related organization. |
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|**relOrganizationId** | The organization identifier of the related organization. |
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|**relCommunityId** | Retrieve projects connected to the community (with OpenAIRE id). |
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@ -150,6 +153,7 @@ The following query parameters are available for projects:
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|**debugQuery** | Retrieve debug information for the search query. |
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|**page** | Page number of the results. |
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|**pageSize** | Number of results per page. |
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| **cursor** | Cursor-based pagination. Initial value: `cursor=*` |
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|**sortBy** | The field to set the sorting order of the results. Should be provided in the format `fieldname sortDirection`, where the `sortDirection` can be either `ASC` for ascending order or `DESC` for descending order and `fielaname` is one of `relevance`, `startDate`, `endDate`. Multiple sorting parameters should be comma-separated. |
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@ -31,14 +31,14 @@ The response of the aforementioned endpoints is an object of the following type:
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...
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]
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}
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```
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It contains a `header` object with the following fields:
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- `numFound`: the total number of entities found
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- `maxScore`: the maximum relevance score of the search results
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- `queryTime`: the time in milliseconds that the search took
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- `page`: the current page of the search results
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- `page`: the current page of the search results (when using basic pagination)
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- `pageSize`: the number of entities per page
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- `nextCursor`: the next page cursor (when using cursor-based pagination, see: [paging](./sorting-and-paging.md#paging)
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Finally, the `results` field contains an array of entities of the corresponding type (i.e., [Research product](../../../data-model/entities/research-product.md), [Organization](../../../data-model/entities/organization.md), [Data Source](../../../data-model/entities/data-source.md), or [Project](../../../data-model/entities/project.md)).
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@ -33,14 +33,55 @@ Example:
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## Paging
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The OpenAIRE Graph API supports paging through the use of `page` and `pageSize` parameters, enabling you to specify which part of the result set to retrieve and how many results per page.
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The OpenAIRE Graph API supports basic and cursor-based pagination. In basic pagination, `page` and `pageSize` parameters are used, enabling you to specify which part of the result set to retrieve and how many results per page.
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### Offset-based paging
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Offset-based paging should be used to retrieve a small dataset only (up to 10000 records).
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* `page`: Specifies the page number of the results you want to retrieve. Page numbering starts from 1.
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* `pageSize`: Defines the number of results to be returned per page. This helps limit the amount of data returned in a single request, making it easier to process.
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Example:
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- Get the top 10 most influential research products that contain the phrase "knowledge graphs":
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[https://api-beta.openaire.eu/graph/researchProducts?search="knowledge graphs"&page=1&pageSize=10&sortBy=influence DESC](https://api-beta.openaire.eu/graph/researchProducts?search=%22knowledge%20graphs%22&page=1&pageSize=10&sortBy=influence%20DESC)
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response:
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```json
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{
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header: {
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numFound: 36818386,
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maxScore: 1,
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queryTime: 21,
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page: 1,
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pageSize: 10
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},
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results: [
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...
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]
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}
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```
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### Cursor-based paging
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Cursor should be used when it is required to retrieve a big dataset (more than 10000 records).
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* `cursor`: Cursor-based pagination. Initial value: `cursor=*`.
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Example:
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- [https://api-beta.openaire.eu/graph/researchProducts?search="knowledge graphs"&pageSize=10&cursor=*&sortBy=influence DESC](https://api-beta.openaire.eu/graph/researchProducts?search=%22knowledge%20graphs%22&pageSize=10&cursor=*&sortBy=influence%20DESC)
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response:
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```json
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{
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header: {
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numFound: 36818386,
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maxScore: 1,
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queryTime: 21,
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pageSize: 10,
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nextCursor: "AoI/D2M2NGU1YjVkNTQ4Nzo6NjlmZTBmNjljYzM4YTY1MjI5YjM3ZDRmZmIyMTU1NDAIP4AAAA=="
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},
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results: [
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...
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]
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}
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```
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Use `nextCursor` value, to get the next page of results.
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Loading…
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