Search the site’s resources

A single starting point to find the method, source or situation relevant to your question.

Find a method for your task

All words must match, regardless of case or accents. Search stays in the selected language.

From two characters: use arrows to choose, Enter to open, Escape to close. You can also submit the full search.

1682 results

Clear filters

Guide
Observed candidate key
A column or combination with no missing or repeated values in the studied file. This observation does not guarantee uniqueness in future versions.
Guide
Surrounding whitespace
Whitespace before or after a value. It may explain failed exact matches; remove it only under a documented rule suitable for the data.
Guide
Unresolved source conflict
Incompatible claims after aligning object, time and scope. Retain both documents and state the check that could resolve the conflict.
Guide
Redirect chain
Responses and addresses between a requested URL and its final destination. A successful final status does not prove the cited document was preserved.
Guide
Pagination cursor
Service-provided value for continuing through results. Keep it with filters and version; it need not be a number or an indefinitely reusable address.
Guide
Statistical stock
Quantity describing a position at a reference date. Summed monthly stocks are not automatically an annual stock; define the measure before aggregation.
Guide
Statistical flow
Quantity covering events over a period. Before adding flows, check compatible definitions and non-overlapping intervals.
Guide
Cumulative total
Value summing flows from a defined starting point. Retain origin, resets and revisions; changes need not represent new events.
Guide
Percentage point
Difference unit for percentages: 20% to 25% is +5 points. This differs from the +25% relative change on the initial base.
Guide
Relative change
Final minus initial value divided by the initial value. Multiply by 100 for a percentage; it is undefined on a zero base.
Guide
Negative search
Search with no matching result under documented query, filters, service and date. It is not by itself general evidence that the fact is absent.
Guide
End-to-end latency
Time between explicitly selected events, such as request sent and accepted output. Name boundaries: first displayed content is not journey completion.
Guide
Cold cache
Test condition without relevant data in the cache under study. State which cache; a fresh browser does not guarantee an empty server cache.
Guide
Warm cache
Test condition allowing reuse of relevant data or components. Describe preparation and separate it from first calls in comparisons.
Guide
Constant geographic scope
Method comparing observations for the same territorial units. It separates changes in the phenomenon from changes created by adding or removing a territory.
Guide
Weighted mean
Mean accounting for each observation’s weight. To combine comparable rates, use their relevant denominators; an unweighted mean gives equal weight to different population sizes.
Guide
Statistical vintage
State of a series available at a date or in a particular release, including revisions then known. Keeping that vintage allows results to be reproduced after updates.
Guide
Conditional rate
Proportion calculated within a defined subset, such as accessible answers. Report its selection condition and excluded counts without treating it as a rate for all attempts.
Guide
HTTP 206 — partial content
Response delivering part of the requested representation. Read the received range and request context; an accessible portion does not establish that the whole document was examined.
Guide
Imputation
Method assigning an estimated value to a missing observation under explicit assumptions. Keep the imputation marker and original missing state; the result remains an estimate even when published by the producer.
Guide
URL fragment
Part after # in a URL, often identifying a section. Its presence in a link does not establish that the page still has the corresponding target after migration.
Guide
Private cache
Cache dedicated to one user, for example in their browser. Its state can differ from a shared cache; a new-session test does not represent every previously stored resource.
Guide
Shared cache
Cache able to reuse responses for multiple users, for example at an HTTP intermediary. Check its version and rules separately from the browser; renewing a session does not ensure its update.
Public source
OECD Data Explorer : Does the latest version preserve your series key?
OECD distinguishes data and structure queries. An unspecified version uses the current structure, which may add, remove or rename dimensions.

Choose a starting point

Choose a method

Start from a task: verify, compare, document or decide.

Check a source

Examine the origin, date, scope and limits of information.

Understand a term

Find definitions before applying a protocol.

How can I refine the search?

Start with the topic: Enter one or two specific terms: citation, CSV or provenance. Every word must be present, so a long sentence can exclude useful pages.
Broaden before filtering: Search all families first. Then select a guide, protocol or source according to the kind of answer you need.
Try different wording: Try a synonym or a term in the selected language. Quotes, OR and asterisks are not search operators.

DEEPER READING / PRACTICE

Turn internal search into a useful user journey

A query produces several close results. Reading should help to distinguish the need definition folder, detailed method and implementation tool.

Updated on 2026-10-21.

Priority checks

Formulate a specific need and then try neighboring terms. Read the descriptions and select the type of resource according to the searched step: understand, run or control.

Interpretation pitfalls

The first result is not always the best document to the context. An absence can come from the vocabulary used rather than a lack of content.

Working record to retain

A short route connects a need definition page, a guide and a checklist. Maintaining unresolved questions helps to rebuild research.

PRACTICAL CASE / WORKED EXAMPLE

A natural requirement does not match the exact title

The following case illustrates an approach to defining the need. Situations are pedagogical: they serve to examine the choices and conditions of success, without describing a fulfilled mission or announcing a guaranteed result.

Example context

A reader is looking for how to check a number, while the resources use the word indicator. The results must allow to continue despite a different formulation of the title.

Suggested approach

Try the neighboring terms and read the descriptions. Differentiate methods of calculation, comparison and verification of sources. Choose the resource that corresponds to the actually sought-by-step.

Conclusion and next step

Research becomes a path of solution. The questions still open serve to clarify the next query instead of multiplying the words without clear intention.

Questions for deeper practice

How do you improve a search without losing the initial need?

Keep the starting question and then specify the object, operation and resource type. Useful results give a complementary vocabulary, but their title should not automatically replace the reader's target.

DETAILED WORKSHOP / APPLICATION

Refine a query for the task to carry out

01 / Prepare the necessary information
Describe the initial question and the desired result. Identify the object, operation and type of resource that could help: file, method or tool.
02 / Carry out the approach
Try a formulation and read the descriptions. Release the useful terms and test the variants without giving up the intention. Compare the resources found according to their contribution to the route.
03 / Examine an alternative situation
If the results are close but too general, specify the operation or scope. A well-classed page is not necessarily the one that meets the searched step.
04 / Decide on the next step
Research is useful when it leads to a resource whose response can be identified. Open questions are used to prepare for the next consultation.
05 / Hand over the verification records
Keep a short track with request, resource and supplement. The reader can restart his work without repaired the tests that have led to useful content.

ANNOTATED WORKING DOCUMENT / REVIEW GRID

A track record from a request

The note retains question, tried formulations, useful results and next resource. It distinguishes the exploration vocabulary from the initial goal of the reader.

On a small screen, scroll the grid horizontally to read all three columns.

Example situations to assess
Observation	Supported interpretation	Next step
A resource responds to the desired operation.	The result can serve as a useful step in the course.	Keep the passage and choose the necessary supplement.
The results remain general despite the good topic.	The request must specify action, object or scope.	Try an appropriate formulation without losing the initial question.
The first result has the word but not the answer.	The presence of the term does not prove its relevance.	Read the descriptions and compare the contribution of resources.

Reviewing the working document

The final verification verifies that each step reduces an open question. A link list is not yet a useful path if the reader cannot explain what each page brings.

REPORTING / EXAMPLE WORDING

Presentation of results: Turn internal search into a useful user journey

Point to clarify

A search result must be judged according to its contribution to the searched operation.

Before handing over

Check that the track keeps the initial question despite the vocabulary variants.

Example of a qualified conclusion

The resource selected meets the described stage of the need. The questions still open guidelines the next consultation and remain distinct from the answer found.