Search rules

The platform search understands everything from a single word to a complex expression. Each feature below comes with an example — click it to see the result at once.

Basics

Operator	What it does	Example
—	If several words are entered, texts containing all of them are found (word order does not matter).	`eritma suv` `kaliy xlorid`
`" "`	Texts where the quoted words appear in EXACTLY this order, next to each other.	`"kristall kukun"`

Boolean operators

Operator	What it does	Example
`AND &`	Both words are required. This rule applies even without the explicit operator.	`eritma AND suv` `eritma & suv`
`OR \|\|`	At least one of the words is enough.	`oq OR sariq` `oq \|\| sariq`
`NOT -`	Texts that do NOT contain the given word.	`eritma NOT spirt` `eritma -spirt`
`( )`	Parentheses group conditions: what is inside is evaluated first.	`(oq OR sariq) AND kukun`

Wildcards

Operator	What it does	Example
`*`	Stands for zero or more characters: at the start, end or inside a word.	`xromato` `metriya` `mi*metr`
`?`	Stands for EXACTLY one character.	`m?kro`
`~1 ~2`	Fuzzy search: finds the word even with 1 or 2 spelling differences.	`kromatogram~1` `eritma~2`

Phrase and proximity

Operator	What it does	Example
`" "~N`	Texts where the words are at most N words apart, in the given order.	`"eritma suv"~3`
`partial:" "`	By a part INSIDE a word: the beginning and the end of the word may be anything.	`partial:"gidrat"` `partial:"ly acid"`

Field search

Operator	What it does	Example
`title:`	Searches the text TITLE only.	`title:vaksina` `title:natriy*`
`number:`	By text number: monograph, general chapter or reagent.	`number:20229` `number:1095500`

Useful tips

The "Title/number only" switch also searches titles — it works the same way as title:.
The filters on the left (issue, chapter, text type, status) work TOGETHER with the query and narrow the result.
The Advanced panel on the left lets you choose the search scope: everywhere, titles only, or the text of the articles only.
The same panel narrows a query by properties: has a CAS number, has a molecular formula, reagent, Russian text available, my bookmarks and viewed.
You may type in Cyrillic or Latin — the result is the same.
Operators can be combined: title:natriy* AND (xlorid OR sulfat).
A very broad query (for example partial:"a") is slow — make the query more specific.

The search is built on a dedicated syntax.