eduKateSG · Why Science?
One question can travel across borders when its language and source route stay visible
Read WorldWideScience through federated queries, machine translation, participating portals, relevance ranking, live responses and source hand-offs.
Important science is published through national portals and specialist databases around the world. WorldWideScience provides a global gateway that sends a query to participating scientific sources and gathers their responses into a shared result view.
Official WorldWideScience material describes federated search: the service translates and distributes a query to individual databases or portals, receives live results, ranks them and links the user onward to the host source. The gateway is maintained by the U.S. Department of Energy Office of Scientific and Technical Information in partnership with the International Council for Scientific and Technical Information.
Did you know? Federated search differs from a conventional crawler. The gateway asks participating sources at search time, so one slow or unavailable source can affect that particular result set. Search status is therefore part of the evidence trail.
This guide treats translation as a discovery bridge and the host record as the verification point. A translated query or snippet may reveal research you would otherwise miss, but terminology, methods and claims should be checked in the original source and full document.
Chapter index
Chapters 1–9: federation, translation and ranking
- 1. Federated search queries live sources
- 2. The gateway and host have different roles
- 3. A translated query is an interpretation
- 4. Translation expands recall with uncertainty
- 5. Result translation aids scanning
- 6. Relevance ranking combines responses
- 7. Source coverage defines the universe
- 8. Source status belongs in the method
- 9. Freshness comes from the source
Chapters 10–17: source status, access, provenance and verification
- 10. Titles and abstracts are screening evidence
- 11. Host records preserve local identifiers
- 12. Full-text access varies by source
- 13. Document types require different appraisal
- 14. Duplicate manifestations can appear
- 15. Query syntax should be recorded
- 16. The international partnership matters
- 17. Multilingual discovery supports careers
Federated search sends one question to several live sources rather than copying every source into one index. WorldWideScience sends a user query to multiple participating databases and portals rather than relying only on one central copied index. Returned records reflect each source’s current response. This lets students explore research beyond the sources they already know.
Try this
Evidence question: Which sources received this query? Answer in three parts: identify the visible field or file, explain how it bears on the question, and state the boundary of that evidence. Preserve the database’s own object names and accession rather than flattening everything into the word ‘data’.
Try this: Save the participating-source list and search time. Turn the result into a compact claim-evidence-reasoning note, then ask a partner to retrace it. Keep the identifier, retrieval date and source page in the note so the route can be repeated.
Evidence checkpoint
Record the evidence object for federated search queries live sources, its identifier or version context, and one limit that must remain visible.
Machine translation can cross language barriers, while scientific meaning still needs checking in the original record. WorldWideScience combines discovery results, while each host portal provides the detailed record and available full text. The host controls its metadata, access and corrections. It also prevents a translated snippet from becoming stronger evidence than the source document.
Try this
Evidence question: Where does the selected record originate? Answer in three parts: identify the visible field or file, explain how it bears on the question, and state the boundary of that evidence. Preserve the database’s own object names and accession rather than flattening everything into the word ‘data’.
Try this: Record both the gateway result and destination URL. Turn the result into a compact claim-evidence-reasoning note, then ask a partner to retrace it. If a field is missing, write “not shown” and follow the official documentation rather than inventing a value.
Evidence checkpoint
Record the evidence object for the gateway and host have different roles, its identifier or version context, and one limit that must remain visible.
A ranked result list is a temporary view of responses from participating databases. Machine translation maps search terms into other languages so sources can be queried across language boundaries. Scientific phrases can have several valid translations. The search becomes repeatable when each participating source and failure state is recorded.
Try this
Evidence question: Which translated term was sent to this source? Answer in three parts: identify the visible field or file, explain how it bears on the question, and state the boundary of that evidence. Preserve the database’s own object names and accession rather than flattening everything into the word ‘data’.
Try this: Back-translate key terms and compare them with domain vocabulary. Turn the result into a compact claim-evidence-reasoning note, then ask a partner to retrace it. Before comparing two records, check that their object types, methods, versions and units really align.
Evidence checkpoint
Record the evidence object for a translated query is an interpretation, its identifier or version context, and one limit that must remain visible.
Global discovery works best when source, query language and retrieval status remain attached. A translated query can reveal literature that an English-only search misses. It can also introduce ambiguous synonyms or lose a technical distinction. Curiosity can travel widely without losing provenance.
Try this
Evidence question: Which concept may have shifted in translation? Answer in three parts: identify the visible field or file, explain how it bears on the question, and state the boundary of that evidence. Preserve the database’s own object names and accession rather than flattening everything into the word ‘data’.
Try this: Run an identifier or author search as a language-independent check. Turn the result into a compact claim-evidence-reasoning note, then ask a partner to retrace it. Finish by naming one supported statement and one stronger statement that still needs another evidence layer.
Evidence checkpoint
Record the evidence object for translation expands recall with uncertainty, its identifier or version context, and one limit that must remain visible.
Federated search sends one question to several live sources rather than copying every source into one index. The gateway can translate result information for the reader. That display helps prioritise records but should not be treated as an authorised translation of the full scientific work. This lets students explore research beyond the sources they already know.
Try this
Evidence question: Is this text source metadata or machine-translated display? Answer in three parts: identify the visible field or file, explain how it bears on the question, and state the boundary of that evidence. Preserve the database’s own object names and accession rather than flattening everything into the word ‘data’.
Try this: Label the translation and preserve the original title. Turn the result into a compact claim-evidence-reasoning note, then ask a partner to retrace it. Keep the identifier, retrieval date and source page in the note so the route can be repeated.
Evidence checkpoint
Record the evidence object for result translation aids scanning, its identifier or version context, and one limit that must remain visible.
Machine translation can cross language barriers, while scientific meaning still needs checking in the original record. Results are returned in a relevance-ranked order according to the gateway and source information. Rank supports browsing; it is not a measure of study quality or consensus. It also prevents a translated snippet from becoming stronger evidence than the source document.
Try this
Evidence question: Why might this record appear near the top? Answer in three parts: identify the visible field or file, explain how it bears on the question, and state the boundary of that evidence. Preserve the database’s own object names and accession rather than flattening everything into the word ‘data’.
Try this: Compare rank with date, source and exact term match. Turn the result into a compact claim-evidence-reasoning note, then ask a partner to retrace it. If a field is missing, write “not shown” and follow the official documentation rather than inventing a value.
Evidence checkpoint
Record the evidence object for relevance ranking combines responses, its identifier or version context, and one limit that must remain visible.
A ranked result list is a temporary view of responses from participating databases. WorldWideScience searches participating national and international scientific databases and portals. Literature outside those sources is outside the returned universe. The search becomes repeatable when each participating source and failure state is recorded.
Try this
Evidence question: Which relevant country or discipline might be absent? Answer in three parts: identify the visible field or file, explain how it bears on the question, and state the boundary of that evidence. Preserve the database’s own object names and accession rather than flattening everything into the word ‘data’.
Try this: Name the covered sources before describing the search as broad. Turn the result into a compact claim-evidence-reasoning note, then ask a partner to retrace it. Before comparing two records, check that their object types, methods, versions and units really align.
Evidence checkpoint
Record the evidence object for source coverage defines the universe, its identifier or version context, and one limit that must remain visible.
Global discovery works best when source, query language and retrieval status remain attached. A live federated search can encounter timeouts, incomplete responses or unavailable sources. A count without source status can overstate coverage. Curiosity can travel widely without losing provenance.
Try this
Evidence question: Did every selected source complete? Answer in three parts: identify the visible field or file, explain how it bears on the question, and state the boundary of that evidence. Preserve the database’s own object names and accession rather than flattening everything into the word ‘data’.
Try this: Record complete, partial and failed sources separately. Turn the result into a compact claim-evidence-reasoning note, then ask a partner to retrace it. Finish by naming one supported statement and one stronger statement that still needs another evidence layer.
Evidence checkpoint
Record the evidence object for source status belongs in the method, its identifier or version context, and one limit that must remain visible.
Federated search sends one question to several live sources rather than copying every source into one index. Because queries are sent to databases at search time, the gateway can expose recent records as soon as participating sources make them searchable. Update schedules still vary. This lets students explore research beyond the sources they already know.
Try this
Evidence question: When was this source record updated? Answer in three parts: identify the visible field or file, explain how it bears on the question, and state the boundary of that evidence. Preserve the database’s own object names and accession rather than flattening everything into the word ‘data’.
Try this: Check the host record date rather than inferring freshness from retrieval time. Turn the result into a compact claim-evidence-reasoning note, then ask a partner to retrace it. Keep the identifier, retrieval date and source page in the note so the route can be repeated.
Evidence checkpoint
Record the evidence object for freshness comes from the source, its identifier or version context, and one limit that must remain visible.
CHAPTER 10 OF 17 · Cross the language boundary
10. Titles and abstracts are screening evidence
Machine translation can cross language barriers, while scientific meaning still needs checking in the original record. Gateway snippets help decide what to open. They do not show the complete method, figures, references, corrections or licence. It also prevents a translated snippet from becoming stronger evidence than the source document.
Try this
Evidence question: What question can this abstract answer safely? Answer in three parts: identify the visible field or file, explain how it bears on the question, and state the boundary of that evidence. Preserve the database’s own object names and accession rather than flattening everything into the word ‘data’.
Try this: Write a screening reason and then open the host record. Turn the result into a compact claim-evidence-reasoning note, then ask a partner to retrace it. If a field is missing, write “not shown” and follow the official documentation rather than inventing a value.
Evidence checkpoint
Record the evidence object for titles and abstracts are screening evidence, its identifier or version context, and one limit that must remain visible.
CHAPTER 11 OF 17 · Cross the language boundary
11. Host records preserve local identifiers
A ranked result list is a temporary view of responses from participating databases. National portals may use accessions, report numbers, DOIs or local record IDs. Those identifiers should remain labelled with their system. The search becomes repeatable when each participating source and failure state is recorded.
Try this
Evidence question: Which identifier resolves at the host? Answer in three parts: identify the visible field or file, explain how it bears on the question, and state the boundary of that evidence. Preserve the database’s own object names and accession rather than flattening everything into the word ‘data’.
Try this: Store scheme, value and host together. Turn the result into a compact claim-evidence-reasoning note, then ask a partner to retrace it. Before comparing two records, check that their object types, methods, versions and units really align.
Evidence checkpoint
Record the evidence object for host records preserve local identifiers, its identifier or version context, and one limit that must remain visible.
Global discovery works best when source, query language and retrieval status remain attached. Official material says many results lead to bibliographic details, abstracts and sometimes full text. Access conditions belong to the destination service. Curiosity can travel widely without losing provenance.
Try this
Evidence question: Is the full document free, restricted or unavailable? Answer in three parts: identify the visible field or file, explain how it bears on the question, and state the boundary of that evidence. Preserve the database’s own object names and accession rather than flattening everything into the word ‘data’.
Try this: Record access status without treating a paywall as evidence quality. Turn the result into a compact claim-evidence-reasoning note, then ask a partner to retrace it. Finish by naming one supported statement and one stronger statement that still needs another evidence layer.
Evidence checkpoint
Record the evidence object for full-text access varies by source, its identifier or version context, and one limit that must remain visible.
Federated search sends one question to several live sources rather than copying every source into one index. Federated results can include reports, articles, data and other scientific information from participating systems. Each object type calls for different checks. This lets students explore research beyond the sources they already know.
Try this
Evidence question: What kind of research object is this? Answer in three parts: identify the visible field or file, explain how it bears on the question, and state the boundary of that evidence. Preserve the database’s own object names and accession rather than flattening everything into the word ‘data’.
Try this: Choose an appraisal checklist after identifying the format. Turn the result into a compact claim-evidence-reasoning note, then ask a partner to retrace it. Keep the identifier, retrieval date and source page in the note so the route can be repeated.
Evidence checkpoint
Record the evidence object for document types require different appraisal, its identifier or version context, and one limit that must remain visible.
Machine translation can cross language barriers, while scientific meaning still needs checking in the original record. The same research may be represented in a repository, national portal and journal record. Similar titles do not prove two results are independent studies. It also prevents a translated snippet from becoming stronger evidence than the source document.
Try this
Evidence question: Do identifiers, authors and dates connect these records? Answer in three parts: identify the visible field or file, explain how it bears on the question, and state the boundary of that evidence. Preserve the database’s own object names and accession rather than flattening everything into the word ‘data’.
Try this: Group manifestations before counting studies. Turn the result into a compact claim-evidence-reasoning note, then ask a partner to retrace it. If a field is missing, write “not shown” and follow the official documentation rather than inventing a value.
Evidence checkpoint
Record the evidence object for duplicate manifestations can appear, its identifier or version context, and one limit that must remain visible.
A ranked result list is a temporary view of responses from participating databases. Terms, phrases, Boolean logic, language choice and selected sources shape a federated result. Interface defaults can change over time. The search becomes repeatable when each participating source and failure state is recorded.
Try this
Evidence question: Could another learner reproduce this search? Answer in three parts: identify the visible field or file, explain how it bears on the question, and state the boundary of that evidence. Preserve the database’s own object names and accession rather than flattening everything into the word ‘data’.
Try this: Save the exact query, language, source set and retrieval date. Turn the result into a compact claim-evidence-reasoning note, then ask a partner to retrace it. Before comparing two records, check that their object types, methods, versions and units really align.
Evidence checkpoint
Record the evidence object for query syntax should be recorded, its identifier or version context, and one limit that must remain visible.
Global discovery works best when source, query language and retrieval status remain attached. WorldWideScience is maintained by OSTI with ICSTI partnership, connecting national and international science-information services. Governance explains the source-selection and operating context. Curiosity can travel widely without losing provenance.
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Evidence question: Which organisation operates the gateway? Answer in three parts: identify the visible field or file, explain how it bears on the question, and state the boundary of that evidence. Preserve the database’s own object names and accession rather than flattening everything into the word ‘data’.
Try this: Distinguish gateway governance from authorship of a result. Turn the result into a compact claim-evidence-reasoning note, then ask a partner to retrace it. Finish by naming one supported statement and one stronger statement that still needs another evidence layer.
Evidence checkpoint
Record the evidence object for the international partnership matters, its identifier or version context, and one limit that must remain visible.
Federated search sends one question to several live sources rather than copying every source into one index. Researchers, translators, librarians, information scientists and policy analysts all need cross-language discovery with source verification. This lets students explore research beyond the sources they already know.
Try this
Evidence question: Which hand-off most needs the original wording? Answer in three parts: identify the visible field or file, explain how it bears on the question, and state the boundary of that evidence. Preserve the database’s own object names and accession rather than flattening everything into the word ‘data’.
Try this: Create a bilingual evidence receipt for one result. Turn the result into a compact claim-evidence-reasoning note, then ask a partner to retrace it. Keep the identifier, retrieval date and source page in the note so the route can be repeated.
Evidence checkpoint
Record the evidence object for multilingual discovery supports careers, its identifier or version context, and one limit that must remain visible.
Contents · Previous chapter · Continue at the Science Learning Hub
Let the search cross borders while the evidence keeps its home address
WorldWideScience helps a single question reach scientific databases and portals in different countries and languages. Its value lies in discovery across boundaries, supported by explicit hand-offs to source systems.
Save the original and translated query, selected sources, response status, rank context, host identifier, document type, access route and retrieval date. Then read the original record and full object before interpreting the science.
| Reading object | What it can support | Question to keep visible |
|---|---|---|
| Original query | Reader’s intended concept and syntax | Which technical terms must remain stable? |
| Translated query | Machine-generated search expression | What ambiguity may have entered? |
| Gateway result | Ranked cross-source discovery view | Which sources completed the request? |
| Host record | Source metadata and document route | Which identifier and version apply? |
Sources and next reading
Substantive resource claims in this article were checked against the primary pages below. A structured record is a route into evidence; it does not by itself prove a scientific conclusion. Recheck the live record, evidence labels and release context before using it in assessed work or research.
For a classroom enquiry, save a short research receipt containing the question, search terms, selected object, exact identifier, version, access date and the evidence boundary you observed. Add the file or page that supports each statement. This small routine turns browsing into accountable science learning and gives a teacher, classmate or future analyst a route they can independently follow.
Before sharing the conclusion, ask another reader to retrace the route without verbal hints. If they reach a different version, file or interpretation, improve the receipt and narrow the claim. Reproducibility begins with this practical check. It teaches careful reading, supports fair collaboration and keeps uncertainty visible while evidence moves from an online service into notes, analysis and a final explanation.
A useful final review separates five questions. What object was found? Which organisation or repository maintains it? What exact evidence was inspected? Which statement does that evidence support? What remains uncertain? Answer each question in one sentence, then connect every answer to a visible field, file or source page. This review catches common mistakes: citing a collection when a file supplied the value, treating the newest release as the analysed release, confusing permission with scientific suitability, or turning a discovery count into a conclusion. It also gives students a calm way to improve work. A missing detail becomes a next research step instead of an invitation to guess. When the route is complete, the final explanation can stay simple because the identifiers, dates, versions, limitations and supporting evidence are already organised underneath it.
Primary sources
- WorldWideScience current factsheet — accessed 25 October 2026.
- WorldWideScience gateway — accessed 25 October 2026.
- WorldWideScience search — accessed 25 October 2026.
- OSTI about page — accessed 25 October 2026.
- International Council for Scientific and Technical Information — accessed 25 October 2026.