The search engine uses Lucene syntax to interpret search strings ( see official documentation) ).
To be able to use this syntax, you must indicate in the search text box that you want to perform an advanced search by placing the symbol * at the beginning of the search ( see examples below ).
Attention! When using advanced search:
The search engine may not return results if the syntax entered is not correct.
Relevance sorting is different from simple search so the order of results may vary.
Matches found in the texts are not highlighted
Fields to search
Here you can view the fields in which the information is stored:
| Field name |
Indexing mode |
Observations |
| code |
keyword |
Study/question/series code |
| title_en_US |
text |
Title of the study/question/series |
| description_en_US |
text |
Description of the study/series |
| publishDate |
text |
Study/question publication date. In series, this is the last date the question was asked. |
| questionCodes |
keyword |
Code of the questions that are part of a study |
| questions_en_US |
text |
Statements of study questions |
| descriptors_es_ES |
text |
Descriptive texts of the questions |
| serieCodes |
keyword |
Code for series containing questions that are part of a study |
| collections_es_ES |
text |
Name of the study collections |
| publications_es_ES |
text |
Name of the study publications |
| subjectIndexes_es_ES |
text |
Thematic indexes of the study |
| orders_es_ES |
text |
Name of those who commissioned the study |
| authors_es_ES |
text |
Name of the study authors |
* Currently, catalog data is only available in Spanish (Castilian), represented by the international ISO 3166 standard as "es_ES".
Examples
Get all content containing the term barometer but not January:
* barometer - January
Get all content that does not contain the term barometer but does contain the term "inequality" in that order:
* -barometer +inequality
Get all content containing the terms "election" and "Catalonia" but not "2022"
* title_es_ES:(+elections +catalonia -2022)
Get only content that has barometers and 2024 in the title:
* title_es_ES:(+barometer +2024)
Obtain only content that includes barometers and 2024 in the title but does not contain the word "health":
* title_es_ES:(+barometer +2024 -health)
Get all content containing the term migration in any field:
* \*:(*migration)
Get all the content that has asked questions about divorce
* questions_en_US:(divorce)
Change the weight of a term to change the relevance of the listing
* consumer loyalty^2 in Spain
