Cryptocurrencies data collection
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Filtering parameters
The next list shows the available filters that enables to retrieve only the wanted data.
| Filter | Description |
|---|---|
| site | Website from which we want data (or not) |
| domain | Internet domain from which we want data (or not) |
| title | Words and expressions that must be present (or not) in the titles of returned publications |
| text | Words and expressions that must be present (or not) in the body text of returned publications |
| language | Natural language of the required (or refused) publications. See language codes ISO 639-1 |
| site_language | Website’s language of the required (or refused) publications: en (english), es (spanish), fr (french), … |
| site_country | Website’s country of the required (or refused) publications. See country codes ISO-3166-2 |
| site_region | Website region. See ISO-3166-2 |
| author | Author of the publication. For example, “Shakespeare” |
| published | Publishing timestamp in miliseconds. Conversor |
| crawled | Crawling timestamp in miliseconds. Conversor |
| site_type | Type of website: general, news, blog or discussion |
How to build a filter expression
q = “(filter1: valor1) operador (filter2 : valor2) operador … (filterN : valorN__)”
The spaces between the parts of the expression have been added only in order to gain clarity.
Scaping special characters
Some characters are part of the query syntax: + - * && || ! () [] {} ^ " ? ~ : \ /
In order to avoid confusions they must be preceded by the “” character in the query expression. To search (1+1):2 we have to build the querry as it follows: (1+1):2.
Let’s see another example: to search the URL https://www.linkedin.com we must rewrite as url:https :\ / \ / www.linkedin.com.
q filters examples
| Example | Explanation |
|---|---|
| (site: elpais.com OR site: lavanguardia.com) | Retrieve publications from the websites elpais.com or lavanguardia.com or from the both. |
| NOT (site:yahoo.com AND site:google.com) | Retrieve publications from all the websites excepts from the yahoo.com and google.com websites. |
| ((title:rajoy AND (text:España OR text:Morales)) NOT title:españoles) | Retrieve publications where title includes the words “rajoy” and (or “españa” or “morales”) and excludes “españoles”. |
| (language:es OR language:es) | Retrieve only publications in spanish or french languages. |
| (site_language:es OR site_language:fr) | Retrieve publications from spanish or french websites. |
| NOT (site_language:es) OR NOT (site_language:fr) | Don’t retrieve publications from spanish or french websites. |
| author:Pedrolo | Retrieve only Manuel de Perolo’s publications. |
| (site_type:news OR site_type:blogs) | Retrieve publications from news websites or blog websites. |
| NOT (site_type:news) | Don’t retrieve publication from news websites. |
More information
More information is avaiable in the complete Lucene’s syntax Manual.
Previous Basic Boolean queries