Clase and Periódica (ClasePeriodica)
Why select this database?
- CLASE indexes documents published in Latin American journals specializing in the social sciences and humanities.
- PERIÓDICA covers journals specializing in science and technology.
- Offer access to more than 600,000 bibliographic citations from documents published in 2,600 scholarly journals published in the Spanish, Portuguese, French and English languages.
- Contain information from articles, essays, book reviews, monographs, conference proceedings, technical reports, interviews and brief notes published in journals edited in 24 different countries of Latin America and the Caribbean, as well as from publications that focus on Pan-American issues.
Subjects included
- agricultural sciences
- anthropology
- arts
- biology
- chemistry
- communication science
- demography
- economics
- education
- engineering
- exact sciences
- foreign affairs
- geo sciences
- history
- law
- library and information science
- linguistics and literature
- management and accounting
- medicine
- philosophy
- physics
- politics
- psychology
- religion
- sociology
Database details
| Database name | ClasePeriodica |
|---|---|
| Short database name | UNAM |
| Available on | FirstSearch |
| Sources | More than 2,700 journals |
| Number of records | Over 600,000 |
| Coverage | Clase: 1975 to present. Periódica: 1978 to present. |
| Update frequency | Updated quarterly |
| Producer | Universidad Nacional Autonoma de Mexico (UNAM) |
Indexes
Index labels and search examples
Use a colon after an index label (for example, au:) when you are not certain of your search terms. Use an equal sign after an index label (au=) for an exact match search. You can search with an index label from any search screen. The information you type overrides any default menu selections. The following examples show sample rather than actual searches.
| Search indexes | Labels | Examples |
|---|---|---|
| Keyword | kw: | absoluta and efecto [keyword searches the Source Phrase, Subject, and Title indexes] |
| Abstract | ab: | escala |
| Accession number | no: | CLA0001234 |
| Article type phrase | at= | articulo [use to limit other search terms;browse index for available article types] |
| Author | au: | rodriguez |
| Author phrase | au= | rodriguez alvaro [last name first] |
| Database name phrase | ds= | clase periodica |
| Descriptor | de: | salud |
| Descriptor phrase | de= | salud publica |
| First page | pg: | 2 |
| Identifier | id: | logica |
| Issue | is: | 7 |
| Language phrase | ln= | ingles |
| Publication date | pd: | 2002 [browse index for date formats] |
| Source | so: | gaceta |
| Source phrase | so= | gaceta de economia |
| Standard number | sn: | 0325-1926 |
| Subject | su: | flexibilidad |
| Subject phrase | su= | flexibilidad laboral |
| Title | ti: | formacao |
| Title phrase | ti= | formacao dos compostos no portugues |
| Volume | vo: | 49 |
| Year | yr: | 1999 |
| Year 2 | yy: | 2001 |
Index use and structure
What follows is a list of FirstSearch indexes and the combination of USE and STRUCTURE attributes that can be used to access them.
- For any FirstSearch label where multiple USE attributes are listed all the attributes will provide the exact same search result sets.
- Any USE attribute that is not marked as a restrictor is available via the SCAN service.
- Restrictors are specially implemented indexes and are not available for scanning. Terms for these must be ANDed with other terms to limit the size of the result set. See the table provided for each restrictor to determine valid terms and their associated meaning.
FirstSearch Indexes and USE and STRUCTURE attributes used to access them:
| Index | Description | Use Attribute | Structure Attribute | Indexed Fields and Subfields |
|---|---|---|---|---|
| Keyword (kw) | Any | 5110 | 2 | 245/a 520/a,e,p 650/a 653/a 773/t 954/a |
| Keyword All (ka) | Any | 1016 | 2 | 100/a 110/a 245/a 520/a,e,p 650/a 653/a 700/a 710/a 773/t,x 954/a |
| Abstract (ab) | Abstract | 62 | 2 | 520/a,e,p |
| Accession Number (no) | Control number-local | 12 | 2 | 035/a |
| Article Type Phrase (at=) | Content-type | 1034 | 1 | 949/L |
| Author (au, au=) | Author-name | 1003 | 1,2,101 | 100/a 110/a 700/a 710/a |
| Author Affiliation | Author Affiliation | 5100 | 2 | 100/u 700/u |
| Corporate Author Phrase (co=) | Corporate Author Phrase | 1005 | 1 | 110/a 710/a |
| Descriptor (de, de=) | OCLC Defined | 5650 | 1,2 | 650/a |
| Database Name Phrase (ds=) | OCLC Defined | 5988 | 1 | 904/p |
| First Page (pg) | OCLC Defined | 5006 | 2 | 949/f |
| Identifiers (id) | Subject-local | 29 | 2 | 653/a 954/a |
| Issue (is) | OCLC Defined | 5004 | 2 | 949/b |
| Language Phrase (ln=) | Code-language | 54 | 1 | 546/a |
| Publication Date (pd) | Date | 30 | 2 | 949/e,g |
| Standard Number (sn) | Identifier-standard | 1007 | 2 | 773/x |
| Source (so, so=) | Title-host-item | 1033 | 1,2 | 773/t |
| Subject (su, su=) | Subject | 21 | 1,2 | 650/a 653/a 954/a |
| Title (ti, ti=) | Title | 4 | 2 | 245/a |
| Volume (vo) | OCLC Defined | 5013 | 2 | 949/a |
Record display information
List of FirstSearch fields for ClasePeriodica and the MARC fields to which they correspond:
| Field Name | MARC field(s) |
|---|---|
| Year | 008<date> |
| Standard SICI Code | 024/a |
| Accession Number | 035/a |
| Language of Abstract | 041/b |
| Author | 100/a 700/a |
| Corporate Author | 110/a 710/a |
| Author Affiliation | 100/u 700/u |
| Title | 245/a |
| Number of Bibliographic References | 504/b |
| Abstract | 520/a,e,p |
| Language | 546/a |
| Subject Added Entry, Topical | 650/a |
| Identifier (Spanish) | 653/a |
| Country of Publication | 773/c |
| Citation | 773/g |
| Host Item Entry | 773/t |
| ISSN | 773/x |
| URL to External Website or Link to Full Text Article (Direct Article Access) | 856/u |
| URL for UNAM's Document Delivery Service Center | 902/i |
| Database Name | 904/p |
| Library Holdings | 948 Detailed holdings information is available in FirstSearch Z39.50 Configuration Guide - Element Set Names. |
| Volume Number | 949/a |
| Issue Number | 949/b |
| Page Numbers | 949/c |
| Supplement | 949/d |
| Date | 949/e |
| First Page Number | 949/f |
| Marketing Defined Date | 949/g |
| Julian Day | 949/j |
| Article Type | 949/L |
| OCLC Record Display Type | 949/x |
| Identifier (English) | 954/a |
| Article Focus | 954/b |
Restrictors
The following restrictors can be used only in conjunction with an index search. They must be added to an index search with the Boolean AND to receive results:
| Restrictor | Type | Input | Use Attribute | Structure Attribute |
|---|---|---|---|---|
| Year* | All years Single year Range of years |
-- 19xx, 20xx 19xx - 20xx |
31 | 5 |
| Database Name Phrase* | All Clase Periódica |
-- clase periodica |
5988 | 1 |
| Limit to Full Text | Limit to full text |
-- |
6002 | 2 |
| Limit to Holdings | OCLC Institution Symbol | Enter symbol for OCLC institution | 56 | 2 |
* Both an index and a restrictor.
Note: To find the OCLC symbol for an institution, please see the online version of OCLC Participating Institutions.
Sorting
Search results in the ClasePeriodica database can be sorted by Author (1003), Title (4), Source (1033), and Publication Date (30).
General punctuation rules
Exceptions are made, but these are generally correct:
| Punctuation | Rule | Punctuation | Rule |
|---|---|---|---|
| " | Delete and collapse | $ | Delete and collapse |
| ' | (apostrophe) Delete and collapse | % | Delete and collapse |
| . | (period) Delete and collapse | * | Delete and collapse |
| , | (comma) Delete and collapse | + | Delete and collapse |
| ; | Delete and collapse | > | Delete and collapse |
| : | Delete and collapse | < | Delete and collapse |
| () | Delete and collapse | @ | Delete and collapse |
| <> | Delete and collapse | ? | Delete and collapse |
| {} | Delete and collapse | -- | Delete and collapse |
| [] | Delete and collapse | / | Substitute a space |
| = | Delete and collapse | - | Retain and index |
| ! | Delete and collapse | & | Retain and index |
| # | Delete and collapse | ||
Searching tips
Keyword All searches (1016): The Keyword All search finds information in these fields: Author (100/a, 700/a); Abstract (520/a,e,p); Source (773/t); Standard Number (773/x); Subject (650/a, 653/a, 954/a); Title (245/a) and Year (964/x).
Using limiters: You can limit searches by Year (31), Database Name Phrase (5988) and Library Holdings (56). Limit to Full text (6002) is used to limit to full text from other databases. Full text availability is dependent upon your institution's access arrangements.
Copyright information
Copyright © UNAM. All Rights Reserved.