dokument

/dokument/

Cases

SingularPluralWhen to use it
nominativedokumentthe documentdokumentlethe documentsthe plain dictionary form — the doer of the sentence
genitivedokumentnithe document'sdokumentlenithe documents'the owner — whose it is
accusativedokumentnithe document (as the object)dokumentlenithe documents (as the object)a specific, known object — whom or what
dativedokumentgeto the documentdokumentlegeto the documentsdirection or recipient — to where, to whom
locativedokumentdeat / in the documentdokumentledeat / in the documentswhere it is; also having — mende bar, "I have it"
ablativedokumentdenfrom the documentdokumentledenfrom the documentswhere it comes from; also "than" when comparing
When to use each case
nominative
the plain dictionary form — the doer of the sentence
genitive
the owner — whose it is
accusative
a specific, known object — whom or what
dative
direction or recipient — to where, to whom
locative
where it is; also having — mende bar, "I have it"
ablative
where it comes from; also "than" when comparing

The endings are the same ones the pronouns wear — that page explains when each case is used.

With an owner

One ownedSeveral owned
mydokumentimmy documentdokumentlerimmy documents
yourdokumentingyour documentdokumentleringyour documents
his / herdokumentihis / her documentdokumentlerihis / her documents
ourdokumentibizour documentdokumentleribizour documents
you all'sdokumentigizyou all's documentdokumentlerigizyou all's documents
theirdokumentleritheir documentdokumentleritheir documents

The overlap in the last rows is real, not a mistake: dokumentleri can mean "his / her documents", "their document", or "their documents" — context decides.